Chains and heterogens:
PDB Chain Sequences:
>1b3nA (A:) krrvvvtglgmlspvgntvestwkallagqsgislidhfdtsayatkfaglvkdfncedi isrkeqrkmdafiqygivagvqamqdsgleiteenatrigaaigsgigglglieenhtsl mnggprkispffvpstivnmvaghltimyglrgpsisiatactsgvhnighaariiaygd advmvaggaekastplgvggfgaaralstrndnpqaasrpwdkerdgfvlgdgagmlvle eyehakkrgakiyaelvgfgmssdayhmtsppengagaalamanalrdagieasqigyvn ahgtstpagdkaeaqavktifgeaasrvlvsstksmtghllgaagavesiysilalrdqa vpptinldnpdegcdldfvphearqvsgmeytlcnsfgfggtngslifkki