Chains and heterogens:
PDB Chain Sequences:
>3is4A (A:) msqlahnltlsifdpvanyraariictigpstqsvealkgliqsgmsvarmnfshgshey hqttinnvrqaaaelgvniaialdtkgpeirtgqfvggdavmergatcyvttdpafadkg tkdkfyidyqnlskvvrpgnyiyiddgililqvqshedeqtlectvtnshtisdrrgvnl pgcdvdlpavsakdrvdlqfgveqgvdmifasfirsaeqvgdvrkalgpkgrdimiicki enhqgvqnidsiieesdgimvargdlgveipaekvvvaqkiliskcnvagkpvicatqml esmtynprptraevsdvanavfngadcvmlsgetakgkypnevvqymaricleaqsalne yvffnsikklqhipmsadeavcssavnsvyetkakamvvlsntgrsarlvakyrpncpiv cvttrlqtcrqlnitqgvesvffdadklghdegkehrvaagvefakskgyvqtgdycvvi hadhkvkgyanqtrillve
>3is4A (A:) sqlahnltlsifdpvanyraariictigpstqsvealkgliqsgmsvarmnfshgsheyh qttinnvrqaaaelgvniaialdtkgpeirtgqfvggdavmergatcyvttdpafadkgt kdkfyidyqnlskvvrpgnyiyiddgililqvqshedeqtlectvtnshtisdrrgvnlp gcdvdlpavsakdrvdlqfgveqgvdmifasfirsaeqvgdvrkalgpkgrdimiickie nhqgvqnidsiieesdgimvargdlgveipaekvvvaqkiliskcnvagkpvicatqmle smtynprptraevsdvanavfngadcvmlsgetakgkypnevvqymaricleaqsalney vffnsikklqhipmsadeavcssavnsvyetkakamvvlsntgrsarlvakyrpncpivc vttrlqtcrqlnitqgvesvffdadklghdegkehrvaagvefakskgyvqtgdycvvih ayanqtrillve
>3is4B (B:) msqlahnltlsifdpvanyraariictigpstqsvealkgliqsgmsvarmnfshgshey hqttinnvrqaaaelgvniaialdtkgpeirtgqfvggdavmergatcyvttdpafadkg tkdkfyidyqnlskvvrpgnyiyiddgililqvqshedeqtlectvtnshtisdrrgvnl pgcdvdlpavsakdrvdlqfgveqgvdmifasfirsaeqvgdvrkalgpkgrdimiicki enhqgvqnidsiieesdgimvargdlgveipaekvvvaqkiliskcnvagkpvicatqml esmtynprptraevsdvanavfngadcvmlsgetakgkypnevvqymaricleaqsalne yvffnsikklqhipmsadeavcssavnsvyetkakamvvlsntgrsarlvakyrpncpiv cvttrlqtcrqlnitqgvesvffdadklghdegkehrvaagvefakskgyvqtgdycvvi hadhkvkgyanqtrillve
>3is4B (B:) sqlahnltlsifdpvanyraariictigpstqsvealkgliqsgmsvarmnfshgsheyh qttinnvrqaaaelgvniaialdtkgpeirtgqfvggdavmergatcyvttdpafadkgt kdkfyidyqnlskvvrpgnyiyiddgililqvqshedeqtlectvtnshtisdrrgvnlp gcdvdlpavsakdrvdlqfgveqgvdmifasfirsaeqvgdvrkalgpkgrdimiickie nhqgvqnidsiieesdgimvargdlgveipaekvvvaqkiliskcnvagkpvicatqmle smtynprptraevsdvanavfngadcvmlsgetakgkypnevvqymaricleaqsalney vffnsikklqhipmsadeavcssavnsvyetkakamvvlsntgrsarlvakyrpncpivc vttrlqtcrqlnitqgvesvffdadklghdegkehrvaagvefakskgyvqtgdycvvih ayanqtrillve