Chains and heterogens:
PDB Chain Sequences:
>4fvkA (A:) gspsrspeffywraksqmcevkgwvpthrgfpwgpelpgdlilsrrayvscdltscfkff iayglsanqhllntsmeweeslyktpigsastlstsemilpgrsssacfdglkwtvlvan grdrnsfimikygeevtdtfsasrggplrlpnseciciegscfvivsdgpnvnqsvhriy elqngtvqrwkqlnttginfeystcytinnlikctgtnlwndakrpllrftkelnyqive pcngaptdfprgglttpsckmaqekgeggiqgfildekpawtsktkaessqngfvleqip ngiesegtvslsyelfsnkrtgrsgffqpkgdlisgcqricfwleiedqtvglgmiqels tfcginspvqninwds
>4fvkA (A:) fywraksqmcevkgwvpthrgfpwgpelpgdlilsrrayvscdltscfkffiayglsanq hllntsmeweeslyktpigsastlstsemilpgrsssacfdglkwtvlvangrdrnsfim ikygeevtdtfsasrggplrlpnseciciegscfvivsdgpnvnqsvhriyelqngtvqr wkqlnttginfeystcytinnlikctgtnlwndakrpllrftkelnyqivepcngaptdf prgglttpsckmaqekgeggiqgfildekpawtsktkaessqngfvleqipngiesegtv slsyelfsnkrtgrsgffqpkgdlisgcqricfwleiedqtvglgmiqelstfcginspv qninwds
>4fvkB (B:) gspsrspeffywraksqmcevkgwvpthrgfpwgpelpgdlilsrrayvscdltscfkff iayglsanqhllntsmeweeslyktpigsastlstsemilpgrsssacfdglkwtvlvan grdrnsfimikygeevtdtfsasrggplrlpnseciciegscfvivsdgpnvnqsvhriy elqngtvqrwkqlnttginfeystcytinnlikctgtnlwndakrpllrftkelnyqive pcngaptdfprgglttpsckmaqekgeggiqgfildekpawtsktkaessqngfvleqip ngiesegtvslsyelfsnkrtgrsgffqpkgdlisgcqricfwleiedqtvglgmiqels tfcginspvqninwds
>4fvkB (B:) fywraksqmcevkgwvpthrgfpwgpelpgdlilsrrayvscdltscfkffiayglsanq hllntsmeweeslyktpigsastlstsemilpgrsssacfdglkwtvlvangrdrnsfim ikygeevtdtfsasrggplrlpnseciciegscfvivsdgpnvnqsvhriyelqngtvqr wkqlnttginfeystcytinnlikctgtnlwndakrpllrftkelnyqivepcngaptdf prgglttpsckmaqekgeggiqgfildekpawtsktkaessqngfvleqipngiesegtv slsyelfsnkrtgrsgffqpkgdlisgcqricfwleiedqtvglgmiqelstfcginspv qninwds