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Biol Bull. 1987 Aug;173(1):252-259. doi: 10.2307/1541877.

FREE D-AMINO ACIDS IN THE TISSUES OF MARINE BIVALVES.

Abstract

Seventeen species of marine bivalves were surveyed for the presence of free D-alanine, D-aspartate, and D-valine in their tissues. D-aspartate was found in several species in concentrations approaching those of L-aspartate. D-alanine was detected-particularly in lucinid and vesicomyid clams-at levels exceeding manyfold those of L-alanine. D-valine was absent in all cases. A test of a hydrolysate of bulk soluble proteins of Lucinoma aequizonata, a species characterized by extremely high levels of D-alanine, showed no major incorporation of D-alanine into proteins. The implications of these results, for previously published analytical data and for human nutrition, are discussed.

PMID:
29315000
DOI:
10.2307/1541877

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