Chains and heterogens:
PDB Chain Sequences:
>3sirA (A:) algsvtdrhaaeynmrhknrgmalifnhehfevptlksragtnvdcenltrvlkqldfev tvykdcrykdilrtieysasqnhsdsdcilvailshgemgyiyakdtqykldniwsffta nhcpslagkpklffiqacqgdrldggvtmqrsqtetdgdssmsykipvhadfliaystvp gfyswrnttrgswfmqslcaelaangkrldiltlltfvcqrvavdfesctpdtpemhqqk qipcittmltrilrfsdkq
>3sirA (A:) algsvtdrhaaeynmrhknrgmalifnhehfnvdcenltrvlkqldfevtvykdcrykdi lrtieysasqnhsdsdcilvailshgemgyiyakdtqykldniwsfftanhcpslagkpk lffiqacqgdrldgsykipvhadfliaystvpgfyswrnttrgswfmqslcaelaangkr ldiltlltfvcqrvavdfqipcittmltrilrfs
>3sirB (B:) algsvtdrhaaeynmrhknrgmalifnhehfevptlksragtnvdcenltrvlkqldfev tvykdcrykdilrtieysasqnhsdsdcilvailshgemgyiyakdtqykldniwsffta nhcpslagkpklffiqacqgdrldggvtmqrsqtetdgdssmsykipvhadfliaystvp gfyswrnttrgswfmqslcaelaangkrldiltlltfvcqrvavdfesctpdtpemhqqk qipcittmltrilrfsdkq
>3sirB (B:) aaeynmrhknrgmalifnnvdcenltrvlkqldfevtvykdcrykdilrtieysasqnhs dsdcilvailshiwsfftanhcpslagkpklffiqacsykipvhadfliaystvptrgsw fmqslcaelaangkrldiltlltfvcqrvavdfescqipcittmltrilrfs
>3sirC (C:) algsvtdrhaaeynmrhknrgmalifnhehfevptlksragtnvdcenltrvlkqldfev tvykdcrykdilrtieysasqnhsdsdcilvailshgemgyiyakdtqykldniwsffta nhcpslagkpklffiqacqgdrldggvtmqrsqtetdgdssmsykipvhadfliaystvp gfyswrnttrgswfmqslcaelaangkrldiltlltfvcqrvavdfesctpdtpemhqqk qipcittmltrilrfsdkq
>3sirC (C:) aaeynmrhknrgmalifnhnvdcenltrvlkqldfevtvykdcrykdilrtieysasqnh sdsdcilvailsniwsfftanhcpslagkpklffiqacqvhadfliaystvpswfmqslc aelaangkrldiltlltfvcqrvavdqipcittmltrilrfs
>3sirD (D:) algsvtdrhaaeynmrhknrgmalifnhehfevptlksragtnvdcenltrvlkqldfev tvykdcrykdilrtieysasqnhsdsdcilvailshgemgyiyakdtqykldniwsffta nhcpslagkpklffiqacqgdrldggvtmqrsqtetdgdssmsykipvhadfliaystvp gfyswrnttrgswfmqslcaelaangkrldiltlltfvcqrvavdfesctpdtpemhqqk qipcittmltrilrfsdkq
>3sirD (D:) aaeynmrhknrgmalifnhnvdcenltrvlkqldfevtvykdkdilrtieysasqnhsds dcilvailsiwsfftanhcpslagkpklffiqaadfliaystvpgfyswrnttrgswfmq slcaelaangkrldiltlltfvcqrvavdfqipcittmltrilrfsdkq