Oikawa A, Dellacha JM, Sonenberg M. Chemical analysis of acetylated bovine growth hormone, a growth-hormone inhibitor.
Biochem J 1967;
104:947-52. [PMID:
6049933 PMCID:
PMC1271236 DOI:
10.1042/bj1040947]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Purified bovine growth hormone was acetylated with acetic anhydride under various conditions. Acetylated bovine growth hormone prepared in anhydrous acetic anhydride at 43 degrees for 5min. inhibited the growth-promoting response of unmodified bovine growth hormone in hypophysectomized rats. This acetylated bovine growth hormone contained 18 total acetyl groups/mol., which included 12 N(in)-acetyl and 6-8 hydroxylamine-reactive acetyl groups (acetylated aliphatic hydroxy amino acids and 2-3 O-acetyltyrosine residues). Deacetylation of acetylated bovine growth hormone with hydroxylamine at pH9.5 destroyed its ability to inhibit the growth-promoting activity of bovine growth hormone.
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