L-Alanine,L-a-glutamyl-L-tyrosyl-L-alanyl-L-a-glutamyl-L-tyrosyl-L-alanyl-L-a-glutamyl-L-tyrosyl-L-alanyl-L-a-glutamyl-L-tyrosyl-L-alanyl-L-a-glutamyl-L-tyrosyl-