Chains and heterogens:
PDB Chain Sequences:
>1xtfA (A:) pfvnkqfnykdpvngvdiayikipnagqmqpvkafkihnkiwviperdtftnpeegdlnp ppeakqvpvsyydstylstdnekdnylkgvtklferiystdlgrmlltsivrgipfwggs tidtelkvidtncinviqpdgsyrseelnlviigpsadiiqfecksfghevlnltrngyg stqyirfspdftfgfeeslevdtnpllgagkfatdpavtlahqlihaghrlygiainpnr vfkvntnayyemsglevsfeelrtfgghdakfidslqenefrlyyynkfkdiastlnkak sivgttaslqymknvfkekyllsedtsgkfsvdklkfdklykmlteiytednfvkffkvl nrktflnfdkavfkinivpkvnytiydgfnlrntnlaanfngqnteinnmnftklknftp ghhhhhh
>1xtfB (B:) pfvnkqfnykdpvngvdiayikipnagqmqpvkafkihnkiwviperdtftnpeegdlnp ppeakqvpvsyydstylstdnekdnylkgvtklferiystdlgrmlltsivrgipfwggs tidtelkvidtncinviqpdgsyrseelnlviigpsadiiqfecksfghevlnltrngyg stqyirfspdftfgfeeslevdtnpllgagkfatdpavtlahqlihaghrlygiainpnr vfkvntnayyemsglevsfeelrtfgghdakfidslqenefrlyyynkfkdiastlnkak sivgttaslqymknvfkekyllsedtsgkfsvdklkfdklykmlteiytednfvkffkvl nrktflnfdkavfkinivpkvnytiydgfnlrntnlaanfngqnteinnmnftklknftp ghhhhhh