Chains and heterogens:
PDB Chain Sequences:
>1b4eA (A:) tdlsqrprrlrkspalramfeettlslndlvlpifveeeiddykaveampgvmripekhl areierianagirsvmtfgishhtdetgsdawredglvarmsrickqtvpemivmsdtcf ceytshghcgvlkehgvdndatlenlgkqavvaaaagadfiapsaamdgqvqairqalda agfkdtaimsystkfassfygpfreaagsalkgdrksyqmnpmnrreaireslldeaqga dclmvkpagayldivrelrertelpigayqvsgeyamikfaalagaideekvvleslgsi kragadlifsyfaldlaekkilr