Chains and heterogens:
PDB Chain Sequences:
>1nirA (A:) aaeqyqgaasavdpahvvrtngapdmsesefneakqiyfqrcagchgvlrkgatgkpltp ditqqrgqqylealitygtplgmpnwgssgelskeqitlmakyiqhtppqppewgmpemr eswkvlvkpedrpkkqlndldlpnlfsvtlrdagqialvdgdskkivkvidtgyavhisr msasgryllvigrdaridmidlwakeptkvaeikigiearsvesskfkgyedrytiagay wppqfaimdgetlepkqivstrgmtvdtqtyhpeprvaaiiashehpefivnvketgkvl lvnykdidnltvtsigaapflhdggwdsshryfmtaannsnkvavidskdrrlsalvdvg ktphpgrganfvhpkygpvwstshlgdgsisligtdpknhpqyawkkvaelqgqgggslf ikthpksshlyvdttfnpdarisqsvavfdlknldakyqvlpiaewadlgegakrvvqpe ynkrgdevwfsvwngkndssalvvvddktlklkavvkdprlitptgkfnvyntqhdvy
>1nirB (B:) kaaeqyqgaasavdpahvvrtngapdmsesefneakqiyfqrcagchgvlrkgatgkplt pditqqrgqqylealitygtplgmpnwgssgelskeqitlmakyiqhtppqppewgmpem reswkvlvkpedrpkkqlndldlpnlfsvtlrdagqialvdgdskkivkvidtgyavhis rmsasgryllvigrdaridmidlwakeptkvaeikigiearsvesskfkgyedrytiaga ywppqfaimdgetlepkqivstrgmtvdtqtyhpeprvaaiiashehpefivnvketgkv llvnykdidnltvtsigaapflhdggwdsshryfmtaannsnkvavidskdrrlsalvdv gktphpgrganfvhpkygpvwstshlgdgsisligtdpknhpqyawkkvaelqgqgggsl fikthpksshlyvdttfnpdarisqsvavfdlknldakyqvlpiaewadlgegakrvvqp eynkrgdevwfsvwngkndssalvvvddktlklkavvkdprlitptgkfnvyntqhdvy