Chains and heterogens:
PDB Chain Sequences:
>1fbvA (A:) ppgtvdkkmvekcwklmdkvvrlcqnpklalknsppyildllpdtyqhlrtilsryegkm etlgeneyfrvfmenlmkktkqtislfkegkermyeensqprrnltklslifshmlaelk gifpsglfqgdtfritkadaaefwrkafgektivpwksfrqalhevhpissgleamalks tidltcndyisvfefdiftrlfqpwssllrnwnslavthpgymafltydevkarlqkfih kpgsyifrlsctrlgqwaigyvtadgnilqtiphnkplfqalidgfregfylfpdgrnqn pdltglceptpqdhikvtqeqyelycemgstfqlckicaendkdvkiepcghlmctsclt swqesegqgcpfcrceikgtepivvdpf
>1fbvC (C:) srrlmkeleeirkcgmknfrniqvdeanlltwqglivpdnppydkgafrieinfpaeypf kppkitfktkiyhpnidekgqvclpvisaenwkpatktdqviqslialvndpqpehplra dlaeeyskdrkkfcknaeeftkky