Chains and heterogens:
PDB Chain Sequences:
>1ia7A (A:) agthdystalkdsiiffdankcgpqagennvfdwrgachttdgsdvgvdltggyhdagdh vkfglpqgysaailgwslyefkesfdatgnttkmlqqlkyftdyflkshpnsttfyyqvg egnadhtywgapeeqtgqrpslykadpsspasdilsetsaaltlmylnyknidsayatkc lnaakelyamgkanqgvgngqsfyqatsfgddlawaatwlytatndstyitdaeqfitlg ntmnenkmqdkwtmcwddmyvpaalrlaqitgkqiykdaiefnfnywktqvtttpgglkw lsnwgvlryaaaesmvmlvyckqnpdqslldlakkqvdyilgdnpanmsyiigygsnwci hphhraangytyangdnakpakhlltgalvggpdqndkflddanqyqytevaldynaglv gvlagaikffg