Chains and heterogens:
PDB Chain Sequences:
>1n73A (A:) avsdtsgqtlnehnelevrysevlrelerriihlqrrinmqlqqltllqhniktqvsqil rvevdidvalrackgscaryleyrldkeknlqlekaasyianlkferfeevvveetlnr
>1n73A (A:) evlrelerriihlqrrinmqlqqltllqhniktqvsqilrvevdidvalrackgscaryl eyrldkeknlqlekaasyianlkferfeevv
>1n73B (B:) ssthvnaqkeienrykevkiriestvagslrsmksvlehlrakmqrmeeaiktqkelcsa pctvncrvpvvsgmhcediyrnggrtseayyiqpdlfsepykvfcdmeshgggwtvvqnr vdgssnfardwntykaefgniafgngksicnipgeywlgtktvhqltkqhtqqvlfdmsd wegssvyaqyasfrpeneaqgyrlwvedysgnagnallegatqlmgdnrtmtihngmqfs tfdrdndnwnpgdptkhcsredaggwwynrchaanpngryywggiytkeqadygtddgvv wmnwkgswysmrqmamklrpkwp
>1n73B (B:) aqkeienrykevkiriestvagslrsmksvlehlrakmqrmeeaiktqkelcsapctvnc rvpvvsgmhcediyrnggrtseayyiqpdlfsepykvfcdmeshgggwtvvqnrvdgssn fardwntykaefgniafgngksicnipgeywlgtktvhqltkqhtqqvlfdmsdwegssv yaqyasfrpeneaqgyrlwvedysgnagnallegatqlmgdnrtmtihngmqfstfdrdn dnwnpgdptkhcsredaggwwynrchaanpngryywggiytkeqadygtddgvvwmnwkg swysmrqmamklrpk
>1n73C (C:) dsgqktvqkileevrileqigvshdaqiqelsemwrvnqqfvtrlqqqlvdirqtcsrsc qdttankispitgkdcqqvvdnggkdsglyyikplkakqpflvfceiengngwtviqhrh dgsvnftrdwvsyregfgylaptlttefwlgnekihlltgqqayrlridltdwenthrya dyghfkltpesdeyrlfysmyldgdagnafdgfdfgddpqdkfytthlgmlfstperdnd kyegscaeqdgsgwwmnrchaghlngkyyfggnyrktdvefpyddgiiwatwhdrwyslk mttmkllpmgrdlsghggqqqskgnsrgdn
>1n73C (C:) ktvqkileevrileqigvshdaqiqelsemwrvnqqfvtrlqqqlvdirqtcsrscqdtt ankispitgkdcqqvvdnggkdsglyyikplkakqpflvfceiengngwtviqhrhdgsv nftrdwvsyregfgylaptlttefwlgnekihlltgqqayrlridltdwenthryadygh fkltpesdeyrlfysmyldgdagnafdgfdfgddpqdkfytthlgmlfstperdndkyeg scaeqdgsgwwmnrchaghlngkyyfggnyrktdvefpyddgiiwatwhdrwyslkmttm kllpmgrdlsghggqqqskgns
>1n73D (D:) avsdtsgqtlnehnelevrysevlrelerriihlqrrinmqlqqltllqhniktqvsqil rvevdidvalrackgscaryleyrldkeknlqlekaasyianlkferfeevvveetlnr
>1n73D (D:) ysevlrelerriihlqrrinmqlqqltllqhniktqvsqilrvevdidvalrackgscar yleyrldkeknlqlekaasyianlkferfe
>1n73E (E:) ssthvnaqkeienrykevkiriestvagslrsmksvlehlrakmqrmeeaiktqkelcsa pctvncrvpvvsgmhcediyrnggrtseayyiqpdlfsepykvfcdmeshgggwtvvqnr vdgssnfardwntykaefgniafgngksicnipgeywlgtktvhqltkqhtqqvlfdmsd wegssvyaqyasfrpeneaqgyrlwvedysgnagnallegatqlmgdnrtmtihngmqfs tfdrdndnwnpgdptkhcsredaggwwynrchaanpngryywggiytkeqadygtddgvv wmnwkgswysmrqmamklrpkwp
>1n73E (E:) aqkeienrykevkiriestvagslrsmksvlehlrakmqrmeeaiktqkelcsapctvnc rvpvvsgmhcediyrnggrtseayyiqpdlfsepykvfcdmeshgggwtvvqnrvdgssn fardwntykaefgniafgngksicnipgeywlgtktvhqltkqhtqqvlfdmsdwegssv yaqyasfrpeneaqgyrlwvedysgnagnallegatqlmgdnrtmtihngmqfstfdrdn dnwnpgdptkhcsredaggwwynrchaanpngryywggiytkeqadygtddgvvwmnwkg swysmrqmamklrpk
>1n73F (F:) dsgqktvqkileevrileqigvshdaqiqelsemwrvnqqfvtrlqqqlvdirqtcsrsc qdttankispitgkdcqqvvdnggkdsglyyikplkakqpflvfceiengngwtviqhrh dgsvnftrdwvsyregfgylaptlttefwlgnekihlltgqqayrlridltdwenthrya dyghfkltpesdeyrlfysmyldgdagnafdgfdfgddpqdkfytthlgmlfstperdnd kyegscaeqdgsgwwmnrchaghlngkyyfggnyrktdvefpyddgiiwatwhdrwyslk mttmkllpmgrdlsghggqqqskgnsrgdn
>1n73F (F:) ktvqkileevrileqigvshdaqiqelsemwrvnqqfvtrlqqqlvdirqtcsrscqdtt ankispitgkdcqqvvdnggkdsglyyikplkakqpflvfceiengngwtviqhrhdgsv nftrdwvsyregfgylaptlttefwlgnekihlltgqqayrlridltdwenthryadygh fkltpesdeyrlfysmyldgdagnafdgfdfgddpqdkfytthlgmlfstperdndkyeg scaeqdgsgwwmnrchaghlngkyyfggnyrktdvefpyddgiiwatwhdrwyslkmttm kllpmgrdlsghggqqqskgns