amino acid analysis and low- and high-resolution fast-atom bombardment mass spectroscopy indicated that the toxin from all of the sources was a cyclic pentapeptide ( molecular weight , 824 ) containing glutamic acid , beta-methylaspartic acid , arginine , n-methyldehydrobutyrine , and 3-amino-9-methoxy-2,6,8-trimethyl-10-phenyl-4,6-decadienoic acid .
C0002520
amino acid
C0061472
glutamic acid