1
|
Scherer M, Santana AG, Robinson K, Zhou S, Overkleeft HS, Clarke L, Withers SG. Lipid-mimicking phosphorus-based glycosidase inactivators as pharmacological chaperones for the treatment of Gaucher's disease. Chem Sci 2021; 12:13909-13913. [PMID: 34760177 PMCID: PMC8549773 DOI: 10.1039/d1sc03831a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/17/2021] [Indexed: 01/09/2023] Open
Abstract
Gaucher's disease, the most prevalent lysosomal storage disorder, is caused by missense mutation of the GBA gene, ultimately resulting in deficient GCase activity, hence the excessive build-up of cellular glucosylceramide. Among different therapeutic strategies, pharmacological chaperoning of mutant GCase represents an attractive approach that relies on small organic molecules acting as protein stabilizers. Herein, we expand upon a new class of transient GCase inactivators based on a reactive 2-deoxy-2-fluoro-β-d-glucoside tethered to an array of lipid-mimicking phosphorus-based aglycones, which not only improve the selectivity and inactivation efficiency, but also the stability of these compounds in aqueous media. This hypothesis was further validated with kinetic and cellular studies confirming restoration of catalytic activity in Gaucher cells after treatment with these pharmacological chaperones.
Collapse
Affiliation(s)
- Manuel Scherer
- Dept. of Chemistry. University of British Columbia Vancouver British Columbia V6T 1Z1 Canada
| | - Andrés G Santana
- Dept. of Chemistry. University of British Columbia Vancouver British Columbia V6T 1Z1 Canada
| | - Kyle Robinson
- Dept. of Chemistry. University of British Columbia Vancouver British Columbia V6T 1Z1 Canada
| | - Steven Zhou
- Dept. of Medical Genetics. University of British Columbia Vancouver British Columbia V6H 3N1 Canada
| | | | - Lorne Clarke
- Dept. of Medical Genetics. University of British Columbia Vancouver British Columbia V6H 3N1 Canada
| | - Stephen G Withers
- Dept. of Chemistry. University of British Columbia Vancouver British Columbia V6T 1Z1 Canada
| |
Collapse
|
2
|
Pivaloyl-protected glucosyl iodide as a glucosyl donor for the preparation of β-C-glucosides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
3
|
Xu Y, Uddin N, Wagner GK. Covalent Probes for Carbohydrate-Active Enzymes: From Glycosidases to Glycosyltransferases. Methods Enzymol 2018; 598:237-265. [DOI: 10.1016/bs.mie.2017.06.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
4
|
Ben Bdira F, Kallemeijn WW, Oussoren SV, Scheij S, Bleijlevens B, Florea BI, van Roomen CPAA, Ottenhoff R, van Kooten MJFM, Walvoort MTC, Witte MD, Boot RG, Ubbink M, Overkleeft HS, Aerts JMFG. Stabilization of Glucocerebrosidase by Active Site Occupancy. ACS Chem Biol 2017; 12:1830-1841. [PMID: 28485919 PMCID: PMC5525105 DOI: 10.1021/acschembio.7b00276] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
Glucocerebrosidase
(GBA) is a lysosomal β-glucosidase that
degrades glucosylceramide. Its deficiency results in Gaucher disease
(GD). We examined the effects of active site occupancy of GBA on its
structural stability. For this, we made use of cyclophellitol-derived
activity-based probes (ABPs) that bind irreversibly to the catalytic
nucleophile (E340), and for comparison, we used the potent reversible
inhibitor isofagomine. We demonstrate that cyclophellitol ABPs improve
the stability of GBA in vitro, as revealed by thermodynamic
measurements (Tm increase by 21 °C),
and introduce resistance to tryptic digestion. The stabilizing effect
of cell-permeable cyclophellitol ABPs is also observed in intact cultured
cells containing wild-type GBA, N370S GBA (labile in lysosomes), and
L444P GBA (exhibits impaired ER folding): all show marked increases
in lysosomal forms of GBA molecules upon exposure to ABPs. The same
stabilization effect is observed for endogenous GBA in the liver of
wild-type mice injected with cyclophellitol ABPs. Stabilization effects
similar to those observed with ABPs were also noted at high concentrations
of the reversible inhibitor isofagomine. In conclusion, we provide
evidence that the increase in cellular levels of GBA by ABPs and by
the reversible inhibitor is in part caused by their ability to stabilize
GBA folding, which increases the resistance of GBA against breakdown
by lysosomal proteases. These effects are more pronounced in the case
of the amphiphilic ABPs, presumably due to their high lipophilic potential,
which may promote further structural compactness of GBA through hydrophobic
interactions. Our study provides further rationale for the design
of chaperones for GBA to ameliorate Gaucher disease.
Collapse
Affiliation(s)
| | | | | | - Saskia Scheij
- Department
of Medical Biochemistry Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands
| | - Boris Bleijlevens
- Department
of Medical Biochemistry Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands
| | | | - Cindy P. A. A. van Roomen
- Department
of Medical Biochemistry Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands
| | - Roelof Ottenhoff
- Department
of Medical Biochemistry Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands
| | | | | | | | | | | | | | - Johannes M. F. G. Aerts
- Department
of Medical Biochemistry Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, The Netherlands
| |
Collapse
|
5
|
Doud DFR, Woyke T. Novel approaches in function-driven single-cell genomics. FEMS Microbiol Rev 2017; 41:538-548. [PMID: 28591840 PMCID: PMC5812545 DOI: 10.1093/femsre/fux009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/21/2017] [Indexed: 12/27/2022] Open
Abstract
Deeper sequencing and improved bioinformatics in conjunction with single-cell and metagenomic approaches continue to illuminate undercharacterized environmental microbial communities. This has propelled the 'who is there, and what might they be doing' paradigm to the uncultivated and has already radically changed the topology of the tree of life and provided key insights into the microbial contribution to biogeochemistry. While characterization of 'who' based on marker genes can describe a large fraction of the community, answering 'what are they doing' remains the elusive pinnacle for microbiology. Function-driven single-cell genomics provides a solution by using a function-based screen to subsample complex microbial communities in a targeted manner for the isolation and genome sequencing of single cells. This enables single-cell sequencing to be focused on cells with specific phenotypic or metabolic characteristics of interest. Recovered genomes are conclusively implicated for both encoding and exhibiting the feature of interest, improving downstream annotation and revealing activity levels within that environment. This emerging approach has already improved our understanding of microbial community functioning and facilitated the experimental analysis of uncharacterized gene product space. Here we provide a comprehensive review of strategies that have been applied for function-driven single-cell genomics and the future directions we envision.
Collapse
Affiliation(s)
| | - Tanja Woyke
- DOE Joint Genome Institute, Walnut Creek, CA 94598, USA
| |
Collapse
|
6
|
Emma MG, Lombardo M, Trombini C, Quintavalla A. The Organocatalytic α-Fluorination of Chiral γ-Nitroaldehydes: the Challenge of Facing the Construction of a Quaternary Fluorinated Stereocenter. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600378] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Marco Giuseppe Emma
- Department of Chemistry “G. Ciamician”; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Marco Lombardo
- Department of Chemistry “G. Ciamician”; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Claudio Trombini
- Department of Chemistry “G. Ciamician”; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Arianna Quintavalla
- Department of Chemistry “G. Ciamician”; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| |
Collapse
|
7
|
Jiang J, Artola M, Beenakker TJM, Schröder SP, Petracca R, de Boer C, Aerts JMFG, van der Marel GA, Codée JDC, Overkleeft HS. The Synthesis of Cyclophellitol-Aziridine and Its Configurational and Functional Isomers. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600472] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jianbing Jiang
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Marta Artola
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Thomas J. M. Beenakker
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Sybrin P. Schröder
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Rita Petracca
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Casper de Boer
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Johannes M. F. G. Aerts
- Department of Medical Biochemistry; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Gijsbert A. van der Marel
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Jeroen D. C. Codée
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Herman S. Overkleeft
- Department of Bio-organic Synthesis; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
| |
Collapse
|
8
|
Wagschal S, Guilbaud J, Rabet P, Farina V, Lemaire S. α-C-Glycosides via syn Opening of 1,2-Anhydro Sugars with Organozinc Compounds in Toluene/n-Dibutyl Ether. J Org Chem 2015; 80:9328-35. [DOI: 10.1021/acs.joc.5b01472] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Simon Wagschal
- Pharmaceutical Development
and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Johan Guilbaud
- Pharmaceutical Development
and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Pauline Rabet
- Pharmaceutical Development
and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Vittorio Farina
- Pharmaceutical Development
and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Sébastien Lemaire
- Pharmaceutical Development
and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, B-2340 Beerse, Belgium
| |
Collapse
|
9
|
Kallemeijn WW, Witte MD, Wennekes T, Aerts JMFG. Mechanism-based inhibitors of glycosidases: design and applications. Adv Carbohydr Chem Biochem 2015; 71:297-338. [PMID: 25480507 DOI: 10.1016/b978-0-12-800128-8.00004-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This article covers recent developments in the design and application of activity-based probes (ABPs) for glycosidases, with emphasis on the different enzymes involved in metabolism of glucosylceramide in humans. Described are the various catalytic reaction mechanisms employed by inverting and retaining glycosidases. An understanding of catalysis at the molecular level has stimulated the design of different types of ABPs for glycosidases. Such compounds range from (1) transition-state mimics tagged with reactive moieties, which associate with the target active site—forming covalent bonds in a relatively nonspecific manner in or near the catalytic pocket—to (2) enzyme substrates that exploit the catalytic mechanism of retaining glycosidase targets to release a highly reactive species within the active site of the enzyme, to (3) probes based on mechanism-based, covalent, and irreversible glycosidase inhibitors. Some applications in biochemical and biological research of the activity-based glycosidase probes are discussed, including specific quantitative visualization of active enzyme molecules in vitro and in vivo, and as strategies for unambiguously identifying catalytic residues in glycosidases in vitro.
Collapse
Affiliation(s)
- Wouter W Kallemeijn
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Martin D Witte
- Department of Bio-Organic Chemistry, Stratingh Institute for Chemistry, University of Groningen, Groningen, The Netherlands.
| | - Tom Wennekes
- Department of Synthetic Organic Chemistry, Wageningen University, Wageningen, The Netherlands.
| | - Johannes M F G Aerts
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| |
Collapse
|
10
|
Jiang J, Beenakker TJM, Kallemeijn WW, van der Marel GA, van den Elst H, Codée JDC, Aerts JMFG, Overkleeft HS. Comparing CyclophellitolN-Alkyl andN-Acyl Cyclophellitol Aziridines as Activity-Based Glycosidase Probes. Chemistry 2015; 21:10861-9. [DOI: 10.1002/chem.201501313] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Indexed: 11/12/2022]
|
11
|
Adams BT, Niccoli S, Chowdhury MA, Esarik ANK, Lees SJ, Rempel BP, Phenix CP. N-Alkylated aziridines are easily-prepared, potent, specific and cell-permeable covalent inhibitors of human β-glucocerebrosidase. Chem Commun (Camb) 2015; 51:11390-3. [DOI: 10.1039/c5cc03828f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
N-Octyl conduritol aziridine is a potent and specific covalent inactivator of β-glucocerebrosidase (GBA1) inside live human cells.
Collapse
Affiliation(s)
- B. T. Adams
- Thunder Bay Regional Research Institute
- Ontario
- Canada
| | - S. Niccoli
- Northern Ontario School of Medicine
- Thunder Bay Campus
- Thunder Bay Ontario
- Canada P7B 5E1
| | | | | | - S. J. Lees
- Northern Ontario School of Medicine
- Thunder Bay Campus
- Thunder Bay Ontario
- Canada P7B 5E1
| | - B. P. Rempel
- Department of Science
- Augustana Faculty
- University of Alberta
- Alberta
- Canada
| | - C. P. Phenix
- Thunder Bay Regional Research Institute
- Ontario
- Canada
- Northern Ontario School of Medicine
- Thunder Bay Campus
| |
Collapse
|
12
|
Chakladar S, Wang Y, Clark T, Cheng L, Ko S, Vocadlo DJ, Bennet AJ. A mechanism-based inactivator of glycoside hydrolases involving formation of a transient non-classical carbocation. Nat Commun 2014; 5:5590. [DOI: 10.1038/ncomms6590] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 10/16/2014] [Indexed: 12/21/2022] Open
|
13
|
Willems LI, Jiang J, Li KY, Witte MD, Kallemeijn WW, Beenakker TJN, Schröder SP, Aerts JMFG, van der Marel GA, Codée JDC, Overkleeft HS. From Covalent Glycosidase Inhibitors to Activity-Based Glycosidase Probes. Chemistry 2014; 20:10864-72. [DOI: 10.1002/chem.201404014] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
14
|
Ferraz MJ, Kallemeijn WW, Mirzaian M, Herrera Moro D, Marques A, Wisse P, Boot RG, Willems LI, Overkleeft H, Aerts J. Gaucher disease and Fabry disease: New markers and insights in pathophysiology for two distinct glycosphingolipidoses. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:811-25. [DOI: 10.1016/j.bbalip.2013.11.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/25/2013] [Accepted: 11/05/2013] [Indexed: 10/26/2022]
|
15
|
Stubbs KA. Activity-based proteomics probes for carbohydrate-processing enzymes: current trends and future outlook. Carbohydr Res 2014; 390:9-19. [DOI: 10.1016/j.carres.2014.02.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 02/21/2014] [Accepted: 02/22/2014] [Indexed: 11/27/2022]
|
16
|
Rempel BP, Withers SG. Phosphodiesters serve as potentially tunable aglycones for fluoro sugar inactivators of retaining β-glycosidases. Org Biomol Chem 2014; 12:2592-5. [DOI: 10.1039/c4ob00235k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Deoxy-2-fluoroglycosides were synthesised and tested as covalent glycosidase inactivators. β-d-Gluco-, -manno- and -galacto-configured benzyl-benzylphosphonate derivatives efficiently inactivate β-gluco-, β-manno- and β-galactosidases, while α-gluco- and α-manno-configured phosphate and phosphonate derivatives instead served as slow substrates for their cognate α-glycosidases.
Collapse
Affiliation(s)
- B. P. Rempel
- Department of Chemistry
- University of British Columbia
- Vancouver, Canada
| | - S. G. Withers
- Department of Chemistry
- University of British Columbia
- Vancouver, Canada
| |
Collapse
|
17
|
Walvoort MTC, van der Marel GA, Overkleeft HS, Codée JDC. On the reactivity and selectivity of donor glycosides in glycochemistry and glycobiology: trapped covalent intermediates. Chem Sci 2013. [DOI: 10.1039/c2sc21610h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
Chauvigné-Hines LM, Anderson LN, Weaver HM, Brown JN, Koech PK, Nicora CD, Hofstad BA, Smith RD, Wilkins MJ, Callister SJ, Wright AT. Suite of activity-based probes for cellulose-degrading enzymes. J Am Chem Soc 2012; 134:20521-32. [PMID: 23176123 PMCID: PMC3538167 DOI: 10.1021/ja309790w] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Microbial glycoside hydrolases play a dominant role in the biochemical conversion of cellulosic biomass to high-value biofuels. Anaerobic cellulolytic bacteria are capable of producing multicomplex catalytic subunits containing cell-adherent cellulases, hemicellulases, xylanases, and other glycoside hydrolases to facilitate the degradation of highly recalcitrant cellulose and other related plant cell wall polysaccharides. Clostridium thermocellum is a cellulosome-producing bacterium that couples rapid reproduction rates to highly efficient degradation of crystalline cellulose. Herein, we have developed and applied a suite of difluoromethylphenyl aglycone, N-halogenated glycosylamine, and 2-deoxy-2-fluoroglycoside activity-based protein profiling (ABPP) probes to the direct labeling of the C. thermocellum cellulosomal secretome. These activity-based probes (ABPs) were synthesized with alkynes to harness the utility and multimodal possibilities of click chemistry and to increase enzyme active site inclusion for liquid chromatography-mass spectrometry (LC-MS) analysis. We directly analyzed ABP-labeled and unlabeled global MS data, revealing ABP selectivity for glycoside hydrolase (GH) enzymes, in addition to a large collection of integral cellulosome-containing proteins. By identifying reactivity and selectivity profiles for each ABP, we demonstrate our ability to widely profile the functional cellulose-degrading machinery of the bacterium. Derivatization of the ABPs, including reactive groups, acetylation of the glycoside binding groups, and mono- and disaccharide binding groups, resulted in considerable variability in protein labeling. Our probe suite is applicable to aerobic and anaerobic microbial cellulose-degrading systems and facilitates a greater understanding of the organismal role associated with biofuel development.
Collapse
Affiliation(s)
| | | | - Holly M. Weaver
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Joseph N. Brown
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Phillip K. Koech
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Carrie D. Nicora
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Beth A. Hofstad
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Richard D. Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Michael J. Wilkins
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Stephen J. Callister
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| | - Aaron T. Wright
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington, 99352
| |
Collapse
|