On the structure of α-lactalbumin: II. Amino acid sequences of four peptides formed in the peptic hydrolysis of the native protein

Abstract The amino acid sequences of four peptides isolated from a peptic digest of α-lactal bumin have been established and are as follows: Peptide I: NH 2 -Tyr.Gly.Ser.Gly.Asp.Thr.Glu.Ala.Ileu.Val-COOH Peptide II: NH 2 -Lys.Val.Gly.Ileu.Asp.Tyr-COOH NH 2 Peptide III: NH 2 -Leu.Lys.Asp.(Leu.Gly)Lys.Tyr-COOH Peptide IV: NH 2 -Leu.Lys.Glu.Arg.Asp.Leu.Lys.Gly.Tyr-COOH.