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Alvarez-Arroyo MV, Yagüe S, González-Pacheco FR, Castilla MA, Suzuki Y, Jiménez S, Deudero JJP, Neria F, Velasco L, Caramelo C. [Role of VEGF in the cellular response to injury]. Nefrologia 2003; 23 Suppl 3:54-7. [PMID: 12901194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
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Velasco L, Nabloussi A, De Haro A, Fernández-Martínez JM. Development of high-oleic, low-linolenic acid Ethiopian-mustard (Brassica carinata) germplasm. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2003; 107:823-830. [PMID: 12756471 DOI: 10.1007/s00122-003-1295-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2002] [Accepted: 03/25/2003] [Indexed: 05/24/2023]
Abstract
Seed oil of current zero erucic-acid germplasm of Ethiopian mustard ( Brassica carinata A. Braun) is characterized by a low concentration of oleic acid and high concentrations of linoleic and linolenic acids. Sources of increased oleic-acid (HO) and reduced linolenic-acid (LL) concentration have been developed separately in high erucic-acid germplasm. The objectives of the present research were to study the inheritance of the HO and LL traits in crosses HO x LL, and to develop HOLL recombinants, both in high erucic-acid and zero erucic-acid backgrounds. The HO mutant N2-3591 (about 20% oleic acid compared to 9% in conventional high erucic-acid materials), was reciprocally crossed with the LL lines N2-4961 and HF-186 (both with about 5% linolenic acid compared to 12% in standard high erucic-acid materials). Increased oleic acid concentration of N2-3591 was found to be controlled by alleles at one locus (Ol), whereas three different loci for reduced linolenic-acid concentration (Ln, Ln1 and Ln2) were identified in N2-4961 and HF-186. Crosses between N2-3591 and N2-4961 generated HOLL recombinants where levels of increased oleic-acid and reduced linolenic-acid were similar to those of the parents. However, a transgressive segregation for oleic acid was observed in crosses between N2-3591 and HF-186, where F(2) seeds with up to 29.7% oleic acid were obtained, in comparison to an upper limit of 25.1% in the N2-3591 parent grown in the same environment. The transgressive increased oleic-acid was expressed in the F(3) generation and was attributed to the presence of a second locus, designated Ol2. The transgressive trait was transferred to the zero erucic-acid line 25X-1, resulting in a zero erucic-acid germplasm with very high oleic-acid concentration (83.9% compared to 32.9% in 25X-1) and low linolenic-acid concentration (5.0% compared to 16% in 25X-1). Additionally, two other lines exhibiting different stable levels of increased oleic-acid (70.7% and 79.5%, respectively) and reduced levels of linolenic-acid (7.5% and 8.7%, respectively) were isolated.
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Segundo E, Martín-Bretones G, Ruiz L, Velasco L, Janssen D, Cuadrado IM. First Report of Turnip mosaic virus in Pisum sativum in Spain. PLANT DISEASE 2003; 87:103. [PMID: 30812691 DOI: 10.1094/pdis.2003.87.1.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During 2001 and 2002, Pisum sativum var. vulgare plants grown as commercial crops in Almeria (southeast Spain) showed vein clearing and chlorotic mottle of leaves, leaf deformation, flower abortion, necrotic mottle and deformation of pods, and stunted plant growth. Crude sap of collected plants was mechanically inoculated on healthy pea plants which reproduced symptoms observed in the field; local necrotic lesions were produced on mechanically infected Chenopodium quinoa, C. amaranticolor, and Gomphrena globosa, systemic mosaic symptoms on Brassica napus and Nicotiana benthamiana, and local lesions plus systemic mosaic symptoms on N. clevelandii, which are all characteristic of Turnip mosaic virus (TuMV) (1). A reverse transcription-polymerase chain reaction assay using general primers for the extreme 3' end of the potyvirus genome amplified products of 750 and 1,700 bp in nucleic acid extracts from naturally infected pea plants as well as from the mechanically infected test plants. The overlapping nucleotide sequences of the products (GenBank Accession No. AJ489259) had a nucleotide sequence identity of 86.5% and a derived amino acid identity of 95.0% with several published sequences of TuMV (1). This report cites the first partial nucleotide sequence of TuMV infecting pea crops, and although natural infections of this virus in pea have been reported in Morocco (1976) and in the United States (2), to our knowledge, this is the first report of TuMV in Spain. References: (1) P. Lehmann et al. Physiol. Mol. Plant Pathol. 51:195, 1997. (2) R. Provvidenti. Plant Dis. Rep. 62:482, 1978.
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Cárcaba V, García Amorín Z, Rodríguez Junquera R, Velasco L. [Parkinsonism and putaminal lesion from methanol intoxication]. ANALES DE MEDICINA INTERNA (MADRID, SPAIN : 1984) 2002; 19:438-9. [PMID: 12244798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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Velasco L, Sánchez M, Rubín JM, Hidalgo A, Bordallo C, Cantabrana B. Intracellular cAMP increases during the positive inotropism induced by androgens in isolated left atrium of rat. Eur J Pharmacol 2002; 438:45-52. [PMID: 11906709 DOI: 10.1016/s0014-2999(02)01300-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular interactions of androgens with the plasma membrane may produce rapid cardiovascular effects that cannot be explained by the classic genomic mechanisms. In this sense, 5 alpha- and 5 beta-dihydrotestosterone-induced an acute positive inotropic effect in isolated left atrium of rat, an effect which may be due to cAMP-dependent mechanisms. To prove this, intracellular levels of cAMP, after exposure to androgens in the organ bath, and binding to beta(1)-adrenoceptors were evaluated. After a 4-min exposure, 5 alpha- and 5 beta-dihydrotestosterone increased cAMP levels from 3.83+/-0.61 to 6.15+/-1.1 and 11.18+/-2.4 pmol cAMP/mg of protein, respectively. These increases were inhibited by atenolol and not modified by treatment of the rats with reserpine. The androgen-induced cAMP increase seems to be produced via an extracellular interaction, because positive inotropism and raised levels of cAMP were produced by 5 alpha-dihydrotestosterone conjugated with bovine serum albumin (BSA). In addition, it is independent of beta(1)-adrenoceptor activation, because neither androgen displaced [(3)H]dihydroalprenolol binding. Therefore, the androgens induced a positive inotropic effect via a postsynaptic effect that increases intracellular levels of cAMP. This effect is modulated by transcriptional mechanisms or by a protein with a short half-life.
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Velasco L, Mesa S, Delgado MJ, Bedmar EJ. Characterization of the nirK gene encoding the respiratory, Cu-containing nitrite reductase of Bradyrhizobium japonicum. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1521:130-4. [PMID: 11690645 DOI: 10.1016/s0167-4781(01)00279-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The structural gene, nirK, for the respiratory Cu-containing nitrite reductase from Bradyrhizobium japonicum USDA110 has been isolated and sequenced. The deduced amino acid sequence exhibited a high degree of similarity to other Cu-containing nitrite reductases from various sources. The full-length protein included a signal peptide for protein export. Analysis of the sequence upstream from the structural nirK gene revealed the presence of an anaerobox located 83 base pairs from the putative translational start codon. Cells of strain GRK308, a nitrite reductase-deficient derivative of strain USDA110, were unable to grow when cultured under microaerobic conditions (1% O(2)) in the presence of either nitrate or nitrite. Maximal expression of a nirK-lacZ fusion in strain USDA110 required simultaneously both low level oxygen conditions and the presence of nitrate. Expression of beta-galactosidase activity was not detected in the B. japonicum fixL 7403, fixJ 7360 and fixK(2) 9043 mutants transformed with the nirK-lacZ fusion after incubation of the cells under oxygen-limiting conditions either with or without nitrate. Complementation of B. japonicum 9043 with the fixK(2) gene restored beta-galactosidase activity to levels similar to those found in the parental strain. These results suggest that nirK expression depends on the low-oxygen-responsive two-component regulatory system FixLJ and on the Fnr/FixK-like DNA binding protein FixK(2).
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Segundo E, Janssen D, Velasco L, Ruiz L, Cuadrado IM. First Report of Cucumber leaf spot virus in Spain. PLANT DISEASE 2001; 85:1123. [PMID: 30823301 DOI: 10.1094/pdis.2001.85.10.1123a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cucumber leaf spot virus (CLSV), reclassified as a species in the new genus Aureusvirus (family Tombusviridae) (1), has ≈30-nm isometric particles with a ≈4.4-kb positive-sense, single-stranded RNA. CLSV is transmitted by the chytrid fungus Olpidium bornovanus. The virus has been reported in Germany, Great Britain, Greece, Jordan, and Saudi Arabia. During the fall of 2000, abundant chlorotic spots with necrotic centers were observed on the leaves of cucumber plants grown in a commercial greenhouse in Granada (southeastern Spain). When sap from collected leaves was used to mechanically inoculate cucumber, symptoms were reproduced and were suggestive of CLSV. Based on the nucleic acid sequence of CSLV (2), the following specific primers were designed: CLSVU1440 (5'-AAGGTAGGGGAGATCTTG-3') and CLSVA2160 (5'-GCTTCGGCTGATTCTGA-3'). When used in reverse transcription-polymerase chain reactions (RT-PCR), leaves expressing symptoms yielded amplification products of the expected size (720 bp). These products were cloned into a pGEM-T vector and sequenced (GenBank Accession No. AY038365). The similarity of the nucleic acid and derived amino acid sequences with the one published for CLSV (2) was 94.5 and 99.1%, respectively. The amino acid sequence was 86% identical to that of Pothos latent virus (GenBank Accession No. AJ243370). Ten cucumber plants grown in vermiculite supplemented with rhizosphere soil (1/30, vol/wt) from infected plants developed symptoms on leaves after 1 month and were positive for CLSV when leaf and root tissues were analyzed by RT-PCR and Southern blot hybridization. Plants grown in vermiculite alone did not become infected with CLSV. Microscopic examination of root tissue revealed O. bornovanus only in infected plants. To our knowledge, this is the first record of CSLV in Spain. References: (1) G. P. Martelli et al. Arch. Virol. 143:1847, 1998. (2) J. S. Miller et al. Virus Res. 52:51, 1997.
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Cuadrado IM, Janssen D, Velasco L, Ruiz L, Segundo E. First Report of Cucumber vein yellowing virus in Spain. PLANT DISEASE 2001; 85:336. [PMID: 30832058 DOI: 10.1094/pdis.2001.85.3.336a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In the autumn of 2000, an outbreak of a disease caused considerable losses in greenhouse cucumber crops in Almeria (Spain). Infected plants showed vein clearing followed by chlorosis in leaves and yellow/green chlorotic spots on fruits. These symptoms as well as the presence of Bemisia tabaci in the crops suggested the possible involvement of Cucumber vein yellowing virus (CVYV), a proposed member of the Potiviridae family, which was first described in 1960 in Cucumis spp. from Israel (1). B. tabaci populations and leaves from cucumber plants were collected from the greenhouses and analyzed by RT-PCR using specific primers (CV(+): 5'-AGCTAGCGCGTATGGGGTGAC-3'; CV(-): 5'-GCGCCGCAAGTGCAA-ATAAAT-3') that we designed based on the partial sequence published for CVYV (2). Total nucleic acid extracts from both B. tabaci individuals and the collected plants yielded amplification products of the expected size (449 bp), which were cloned and sequenced (Genebank accession number AJ301640). The sequence was 95.6% identical to that previously reported for CVYV. Nonviruliferous B. tabaci whiteflies were given a 24-h acquisition period on symptomatic leaves and then placed in groups of 15 insects on each of 10 healthy cucumber plants at the 4 leaf-stage for a 24-h inoculation period. Inoculated and control plants were analyzed 1 week later and the infection with CVYV was confirmed (10/10) by RT-PCR. Doublestranded RNA extractions from field-collected samples and from plants inoculated under controlled conditions suggested that no dsRNA formation was associated with the infection. This is the first report of CVYV in Spain. References: (1) S. Cohen and F. E. Nitzany. Phytopathol. Medit. 1:44, 1960. (2) H. Lecoq et al. J. Gen. Virol. 81:2289, 2000.
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Velasco L, Ruiz L, Sánchez MG, Díaz-Laviada I. delta(9)-Tetrahydrocannabinol increases nerve growth factor production by prostate PC-3 cells. Involvement of CB1 cannabinoid receptor and Raf-1. EUROPEAN JOURNAL OF BIOCHEMISTRY 2001; 268:531-5. [PMID: 11168391 DOI: 10.1046/j.1432-1327.2001.01884.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cannabinoids, the active components of marihuana, exert a variety of effects in humans. Many of these effects are mediated by binding to two types of cannabinoid receptor, CB1 and CB2. Although CB1 is located mainly in the central nervous system, it may also be found in peripheral tissues. Here, we study the effect of cannabinoids in the production of nerve growth factor by the prostate tumor cell line PC-3. We show that addition of Delta(9)-tetrahydrocannabinol to PC-3 cells stimulated nerve growth factor production in a dose-dependent and time-dependent manner. Maximal effect was observed at 0.1 microM Delta(9)-tetrahydrocannabinol and 72 h of treatment. Stimulation was reversed by the CB1 antagonists AM 251 and SR 1411716A. Pre-treatment of cells with pertussis toxin also prevented the effect promoted by Delta(9)-tetrahydrocannabinol. These results indicate that Delta(9)-tetrahydrocannabinol stimulation of nerve growth factor production in these cells was mediated by the cannabinoid CB1 receptor. The implication of Raf-1 activation in the mode of action of Delta(9)-tetrahydrocannabinol is also suggested.
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Fischer HM, Velasco L, Delgado MJ, Bedmar EJ, Schären S, Zingg D, Göttfert M, Hennecke H. One of two hemN genes in Bradyrhizobium japonicum is functional during anaerobic growth and in symbiosis. J Bacteriol 2001; 183:1300-11. [PMID: 11157943 PMCID: PMC95004 DOI: 10.1128/jb.183.4.1300-1311.2001] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Previously, we screened the symbiotic gene region of the Bradyrhizobium japonicum chromosome for new NifA-dependent genes by competitive DNA-RNA hybridization (A. Nienaber, A. Huber, M. Göttfert, H. Hennecke, and H. M. Fischer, J. Bacteriol. 182:1472-1480, 2000). Here we report more details on one of the genes identified, a hemN-like gene (now called hemN(1)) whose product exhibits significant similarity to oxygen-independent coproporphyrinogen III dehydrogenases involved in heme biosynthesis in facultatively anaerobic bacteria. In the course of these studies, we discovered that B. japonicum possesses a second hemN-like gene (hemN(2)), which was then cloned by using hemN(1) as a probe. The hemN(2) gene maps outside of the symbiotic gene region; it is located 1.5 kb upstream of nirK, the gene for a Cu-containing nitrite reductase. The two deduced HemN proteins are similar in size (445 and 450 amino acids for HemN(1) and HemN(2), respectively) and share 53% identical (68% similar) amino acids. Expression of both hemN genes was monitored with the help of chromosomally integrated translational lacZ fusions. No significant expression of either gene was detected in aerobically grown cells, whereas both genes were strongly induced (> or = 20-fold) under microaerobic or anaerobic conditions. Induction was in both cases dependent on the transcriptional activator protein FixK(2). In addition, maximal anaerobic hemN(1) expression was partially dependent on NifA, which explains why this gene had been identified by the competitive DNA-RNA hybridization approach. Strains were constructed carrying null mutations either in individual hemN genes or simultaneously in both genes. All mutants showed normal growth in rich medium under aerobic conditions. Unlike the hemN(1) mutant, strains lacking a functional hemN(2) gene were unable to grow anaerobically under nitrate-respiring conditions and largely failed to fix nitrogen in symbiosis with the soybean host plant. Moreover, these mutants lacked several c-type cytochromes which are normally detectable by heme staining of proteins from anaerobically grown wild-type cells. Taken together, our results revealed that B. japonicum hemN(2), but not hemN(1), encodes a protein that is functional under the conditions tested, and this conclusion was further corroborated by the successful complementation of a Salmonella enterica serovar Typhimurium hemF hemN mutant with hemN(2) only.
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Velasco L, Goffman FD, Pujadas-Salvà AJ. Fatty acids and tocochromanols in seeds of Orobanche. PHYTOCHEMISTRY 2000; 54:295-300. [PMID: 10870184 DOI: 10.1016/s0031-9422(00)00085-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The evaluation of tocochromanols (tocopherols and tocotrienols) in 49 accessions from 21 Orobanche species revealed three well separated groups. The first one, characterized by high gamma-tocotrienol content, included all the accessions of sect. Orobanche. The second one, exhibiting high gamma-tocopherol content, comprised the accessions of O. arenaria Borkh. and O. purpurea Jacq. (sect. Trionychon Wallr.). All the other accessions of this section presented high delta-tocopherol content. Differences for tocochromanol derivatives within sect. Trionychon were paralleled by differences in the fatty acid profile, with the high delta-tocopherol class having also a higher oleic to linoleic acid ratio.
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Miranda R, Delgado F, Velasco L, Perez J, Salmon M. Mass spectrometric detection and identification of ortho, para-benzyltoluenes and oligotoluenes. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2000; 14:188-193. [PMID: 10637426 DOI: 10.1002/(sici)1097-0231(20000215)14:3<188::aid-rcm858>3.0.co;2-o] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Mass spectrometric detection and identification of ortho- and para-benzyltoluenes and oligotoluenes, C(21)-C(49), in several reaction mixtures was performed. Thus, the corresponding electron impact spectra were acquired and analyzed, this in addition to constant B/E linked scans and high-resolution data. Copyright 2000 John Wiley & Sons, Ltd.
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Arroyo GA, Miranda R, García JG, Delgado F, Cessa L, Pérez FJ, Velasco L. Mass spectrometric study of tricarbonyl (eta(6)-phenyl methanols) of chromium(0). RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2000; 14:444-449. [PMID: 10717653 DOI: 10.1002/(sici)1097-0231(20000331)14:6<444::aid-rcm888>3.0.co;2-g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A mass spectrometric study of several tricarbonyl (eta(6)-phenyl methanols) of chromium(0) was performed. Electron ionization (EI), chemical ionization (CI) and fast atom bombardment (FAB) mass spectra were acquired for each molecule, and compared in order to establish a general fragmentation pattern. The suggested pathways were investigated and confirmed by means of constant b/e linked scans and high resolution data. In addition a Hammett-McLafferty correlation for some peaks derived from the molecular ions was accomplished.
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Grüneberg WJ, Goffman FD, Velasco L. Characterization of yam bean (Pachyrhizus
spp.) Seeds as potential sources of high palmitic acid oil. J AM OIL CHEM SOC 1999. [DOI: 10.1007/s11746-999-0144-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lorite MJ, Sanjuan J, Velasco L, Olivares J, Bedmar EJ. Characterization of Bradyrhizobium japonicum pcaBDC genes involved in 4-hydroxybenzoate degradation. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1397:257-61. [PMID: 9582432 DOI: 10.1016/s0167-4781(98)00048-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The pca structural genes encode enzymes that participate in the conversion of protocatechuate to succinate and acetylcoenzyme A. A 3. 05-kb region of the Bradyrhizobium japonicum strain USDA110 genome has been characterized, which contains the pcaB, pcaD and pcaC genes. The predicted protein sequences of the three genes have extensive homologies with beta-carboxy-cis,cis-muconate cycloisomerase (PcaB), beta-ketodiapate enol-lactone hydrolase (PcaD), and gamma-carboxymuconolactone decarboxylase (PcaC), respectively, from Acinetobacter calcoaceticus and Pseudomonas putida. The DNA sequence revealed that the pca genes are probably arranged in a single transcriptional unit, pcaBDC, similar to that described in P. putida. A pcaB deletion mutant constructed by marker exchange mutagenesis lost the ability to use 4-hydroxybenzoate or protocatechuate as the only carbon source, demonstrating functionality of the characterized genes in catabolism of hydroxyaromatics by B. japonicum. Furthermore, 4-hydroxybenzoate and protocatechuate became toxic for the pcaB mutant, indicating that hydroxyaromatics catabolism serves both nutritional and detoxifying purposes.
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Velasco L, Mart LM, Haro D. Within-plant variation for seed weight and seed quality traits in white lupin (Lupinus albus L.). ACTA ACUST UNITED AC 1998. [DOI: 10.1071/a96154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The influence of the branch order on seed weight and seed quality traits was
studied in 32 bitter landraces of white lupin. Seeds from the mainstem,
first-order branches, and second-order branches were harvested separately and
the seed weight, protein content, oil content, and oil composition were
determined at each branch order. The results showed the presence of
within-plant variation for all of the traits included in this study. The seeds
from the mainstem were heavier and had lower oil and protein content than the
seeds from the branches. The seed oil from the mainstem was characterised by a
higher percentage of saturated fatty acids and oleic acid, and a lower
percentage of linoleic, linolenic, eicosenoic, and erucic acid than the seeds
from the branches. The seeds from the first branch order were heavier and had
lower oil and protein content than the seeds from the second-order. Seed oil
from the 2 branch orders only differed for the percentage of palmitic acid,
which was higher in the first-order. It is concluded that within-plant
variation in white lupin should be taken into account to avoid sampling
errors, because seeds from one branch order are imperfect as a predictor of
the composition of seeds from the others.
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Cabrera A, Salmón M, Rosas N, Pérez-Flores J, Velasco L, Espinosa-Pérez G, Arias J. Characterization of a novel [Sm(HMPA)4I2]I complex by positive ion fast atom bombardment and high resolution mass spectrometry. Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00237-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Velasco L, Fernández-Martínez JM, De Haro A. Determination of the fatty acid composition of the oil in intact-seed mustard by near-infrared reflectance spectroscopy. J AM OIL CHEM SOC 1997. [DOI: 10.1007/s11746-997-0083-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Alfonso Megido J, Fernández Uribe S, Cortina E, Menéndez Noval A, Velasco L. [The evaluation of the outpatient analgesic treatment of chronic pain]. Aten Primaria 1997; 20:274-5. [PMID: 9453783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Albalate M, Velasco L, Ortiz A, Monzú B, Casado S, Caramelo C. High risk of retinal damage by desferrioxamine in dialysis patients. Nephron Clin Pract 1996; 73:726-7. [PMID: 8856289 DOI: 10.1159/000189179] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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Ortiz-Leon M, Velasco L, Vazquez-Duhalt R. Biocatalytic oxidation of polycyclic aromatic hydrocarbons by hemoglobin and hydrogen peroxide. Biochem Biophys Res Commun 1995; 215:968-73. [PMID: 7488068 DOI: 10.1006/bbrc.1995.2558] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Hemoglobin is able to oxidize polycyclic aromatic hydrocarbons, PAH's, in presence of hydrogen peroxide. Among 12 aromatic compounds tested, six were oxidized; anthracene, carbazole, dibenzothiophene, fluorene, 9-hexylanthracene and pyrene. The products were identified as aromatic ketones and sulfoxides. Effect of organic solvent concentration and hemoglobin stability were determined.
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Sanabria R, Castaneda P, Miranda R, Tobón A, Delgado F, Velasco L. OXIDATIVE CLEAVAGE OF KETOXIMES WITH BENTONITICCLAY-SUPPORTEDCOPPER (II) NITRATE. ORG PREP PROCED INT 1995. [DOI: 10.1080/00304949509458481] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jiménez F, Martin-Morris LE, Velasco L, Chu H, Sierra J, Rosen DR, White K. vnd, a gene required for early neurogenesis of Drosophila, encodes a homeodomain protein. EMBO J 1995; 14:3487-95. [PMID: 7628450 PMCID: PMC394416 DOI: 10.1002/j.1460-2075.1995.tb07355.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The development of the central nervous system in Drosophila is initiated by the segregation of neuroblasts, the neural progenitors, from the embryonic neuroectoderm. This process is guided by at least two classes of genes: the achaete-scute complex (AS-C) proneural genes and the neurogenic genes. It has been known for some time that loss-of-function mutations in the AS-C result in neural hypoplasia and the first observed defect is failure of segregation of a fraction of neuroblasts. Loss-of-function mutations at the ventral nervous system defective (vnd) locus are known to lead to similar phenotypic defects in early neurogenesis. More recently, the vnd locus has been implicated in the regulation of the proneural AS-C genes and the neurogenic genes of the Enhancer of split complex. In this paper we report the identification of a transcript associated with the vnd locus, the transcript distribution in embryogenesis, which is compatible with the nervous system mutant phenotypes described for this gene, and that the protein product is a member of the NK-2 homeodomain family. We discuss these findings within the framework of early Drosophila neurogenesis and the known phenotypes associated with the vnd locus.
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Megido JA, Cárcaba V, Velasco L, Rodríguez Junquera M, López Morán S. [Recurrent hypotension and cutaneous lesions]. Rev Clin Esp 1993; 193:269-70. [PMID: 8256016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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50
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Megido JA, Velasco L, Cárcaba V, Rodríguez Junquera M. [Wegener's granulomatosis: a case with fulminant presentation]. Rev Clin Esp 1993; 192:245. [PMID: 8484041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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