the amino acid composition of the purified enzyme is : 32 aspartic acid + asparagine , 12 threonine , 12 serine , 27 glutamic acid + glutamine , 16 proline , 21 glycine , 24 alanine , 11 valine , 9 methionine , 17 isoleucine , 25 leucine , 4 tyrosine , 7 phenylalanine , 2 half-cystine ( no free sulfhydryl ) , 23 lysine , 6 histidine , 10 arginine and 2 tryptophan , totalling 260 residues .
C0002520
amino acid
C0001898
alanine