(A chain) Pro Tyr Val Ala Leu Phe Glu Lys Cys Cys Leu Ile Gly Cys
Thr Lys Arg Ser Leu Ala Lys Tyr Cys (Disulfide bridge: 9-14)
(B chain) Val Ala Ala Lys Trp Lys Asp Asp Val Ile Lys Leu Cys Gly
Arg Glu Leu Val Arg Ala Gln Ile Ala Ile Cys Gly Met Ser Thr Trp
Ser (Disulfide bridge: A10-B13; A23-B30)