thionein-i is a single chain polypeptide which consists of 61 amino acid residues and has the amino acid composition cys20 , asp3 , asn1 , thr5 , ser9 , gln1 , pro2 , gly5 , ala5 , val2 , met1 , lys7 , with n-acetylmethionine and alanine as nh2- and cooh-terminal amino acids , respectively .
C0001898
alanine
C0002520
amino acids