軟体動物のエキス成分に関する研究-2-スルメイカより分離したα-iminodipropionic acidについて-2-

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Previously, one acidic amino acid was isolated from the squid muscle extracts, and its structure was inferred to be α-iminodipropionic acid from the results of the elemental analysis, mass spectral analysis and NMR spectrum. It has two similar asymmetric carbon atoms and there are three stereoisomeric forms, namely, L-, D-, and meso- form. These compounds were synthesized by the reaction of alanine with α-bromopropionic acid after the method of ABDERHALDEN. The stereochemical structure of the substance isolated from the squid meat was identified as meso-α-iminodipropionic acid by comparison with the authentic specimens. This substance had a peak appearing between cysteic acid and taurine in the liquid chromatogram and gave a very weak coloration with ninhydrin reagent. The structure of this compound is similar to that of octopine and lysopine in which an L-amino acid unites with the amino propionic acid having n-configulation. However, the physiolo-gical roles of these analogous compounds remain unexplained for the present time.
日本水産學會の論文