Chains and heterogens:
PDB Chain Sequences:
>1s4mA (A:) mvvsigvfdgvhighqkvlrtmkeiaffrkddsliytisyppeyflpdfpgllmtvesrv emlsryartvvldffrikdltpegfverylsgvsavvvgrdfrfgknasgnasflrkkgv evyeiedvvvqgkrvssslirnlvqegrveeipaylgryfeiegivhkdrefgrklgfpt anidrgneklvdlkrgvylvrvhlpdgkkkfgvmnvgfrptvgdarnvkyevyildfegd lygqrlklevlkfmrdekkfdsieelkaaidqdvksarnmiddiinskfekeg
>1s4mA (A:) mvvsigvfdgvhighqkvlrtmkeiaffrkddsliytisyppeyflpdfpgllmtvesrv emlsryartvvldffrikdltpegfverylsgvsavvvgrdfrfgknasgnasflrkkgv evyeiedvvvqgkrvssslirnlvqegrveeipaylgryfeiegivhkfptanidrgnek lvdlkrgvylvrvhlpdgkkkfgvmnvgfrptdarnvkyevyildfegdlygqrlklevl kfmrdekkfdsieelkaaidqdvksarnmiddiinsk
>1s4mB (B:) mvvsigvfdgvhighqkvlrtmkeiaffrkddsliytisyppeyflpdfpgllmtvesrv emlsryartvvldffrikdltpegfverylsgvsavvvgrdfrfgknasgnasflrkkgv evyeiedvvvqgkrvssslirnlvqegrveeipaylgryfeiegivhkdrefgrklgfpt anidrgneklvdlkrgvylvrvhlpdgkkkfgvmnvgfrptvgdarnvkyevyildfegd lygqrlklevlkfmrdekkfdsieelkaaidqdvksarnmiddiinskfekeg
>1s4mB (B:) mvvsigvfdgvhighqkvlrtmkeiaffrkddsliytisyppeyflpdfpgllmtvesrv emlsryartvvldffrikdltpegfverylsgvsavvvgrdfrfgknasgnasflrkkgv evyeiedvvvqgkrvssslirnlvqegrveeipaylgryfeiegivhkfptanidrgnek lvdlkrgvylvrvhlpdgkkkfgvmnvgfnvkyevyildfegdlygqrlklevlkfmrde kkfdsieelkaaidqdvksarnmiddiinskf