the preparation gave a single spot on high-voltage electrophoresis at ph 9.0 , had no free amino group , and was characterized by a simple amino acid composition of equimolar quantities of l-methionine , l-tyrosine , d-alanine , d-glutamic acid , erythro beta-methyl aspartic acid and methylamine .
C0002520
amino acid
C0001898
alanine