Chains and heterogens:
PDB Chain Sequences:
>3qr3A (A:) mgvrfagvniagfdfgcttdgtcvtskvypplknftgsnnypdgigqmqhfvnedgmtif rlpvgwqylvnnnlggnldstsiskydqlvqgclslgaycivdihnyarwnggiigqggp tnaqftslwsqlaskyasqsrvwfgimnephdvnintwaatvqevvtairnagatsqfis lpgndwqsagafisdgsaaalsqvtnpdgsttnlifdvhkyldsdnsgthaecttnnidg afsplatwlrqnnrqailtetgggnvqsciqdmcqqiqylnqnsdvylgyvgwgagsfds tyvltetptssgnswtdtslvssclarkggsgsghhhhhh
>3qr3A (A:) mgvrfagvniagfdfgcttdgtcvtskvypplknftgsnnypdgigqmqhfvnedgmtif rlpvgwqylvnnnlggnldstsiskydqlvqgclslgaycivdihnyarwnggiigqggp tnaqftslwsqlaskyasqsrvwfgimnephdvnintwaatvqevvtairnagatsqfis lpgndwqsagafisdgsaaalsqvtnpdgsttnlifdvhkyldsdnsgthaecttnnidg afsplatwlrqnnrqailtetgggnvqsciqdmcqqiqylnqnsdvylgyvgwgagsfds tyvltetptssgnswtdtslvssclarkg
>3qr3B (B:) mgvrfagvniagfdfgcttdgtcvtskvypplknftgsnnypdgigqmqhfvnedgmtif rlpvgwqylvnnnlggnldstsiskydqlvqgclslgaycivdihnyarwnggiigqggp tnaqftslwsqlaskyasqsrvwfgimnephdvnintwaatvqevvtairnagatsqfis lpgndwqsagafisdgsaaalsqvtnpdgsttnlifdvhkyldsdnsgthaecttnnidg afsplatwlrqnnrqailtetgggnvqsciqdmcqqiqylnqnsdvylgyvgwgagsfds tyvltetptssgnswtdtslvssclarkggsgsghhhhhh
>3qr3B (B:) mgvrfagvniagfdfgcttdgtcvtskvypplknftgsnnypdgigqmqhfvnedgmtif rlpvgwqylvnnnlggnldstsiskydqlvqgclslgaycivdihnyarwnggiigqggp tnaqftslwsqlaskyasqsrvwfgimnephdvnintwaatvqevvtairnagatsqfis lpgndwqsagafisdgsaaalsqvtnpdgsttnlifdvhkyldsdnsgthaecttnnidg afsplatwlrqnnrqailtetgggnvqsciqdmcqqiqylnqnsdvylgyvgwgagsfds tyvltetptssgnswtdtslvssclarkg