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Biosci Biotechnol Biochem. 1995 Jul;59(7):1374-6.

Structural analysis of new syringopeptins by tandem mass spectrometry.

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Graduate School of Biological Sciences, Nara Institute of Science and Technology, Japan.


New syringopeptins SP(SC)-1 and -2 were isolated from culture filtrates of phytopathogenic bacterium strain SC1 of Pseudomonas syringae pv. syringae. These syringopeptins were composed of a beta-hydroxy fatty acid, a long sequence of aliphatic amino acids. and a lactone moiety of eight amino acids. The amino acid sequences were deduced from a comparison of their tandem mass sepctra with those of known syringopeptins SP-22a and SP-25a. SP(SC)-1 and SP(SC)-2 resembled SP-22a, but differed from the latter by 3 amino acids.

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