Chains and heterogens:
PDB Chain Sequences:
>1is9A (A:) agvpfntkypygptsiadnqsevtamlkaewedwkskritsngaggykrvqrdastnydt vsegmgyglllavcfneqalfddlyryvkshfngnglmhwhidannnvtshdggdgaatd adedialalifadkqwgssgainygqeartlinnlynhcvehgsyvlkpgdrwggssvtn psyfapawykvyaqytgdtrwnqvadkcyqiveevkkynngtglvpdwctasgtpasgqs ydykydatrygwrtavdyswfgdqrakancdmltkffardgakgivdgytiqgskisnnh nasfigpvaaasmtgydlnfakelyretvavkdseyygyygnslrlltllyitgnfpnpl sdl
>1is9A (A:) agvpfntkypygptsiavtamlkaewedwkskritsngaggykrvqrdastnydtvsegm gyglllavcfneqalfddlyryvkshfngnglmhwhidannnvtshdggdgaatdadedi alalifadkqwgssgainygqeartlinnlynhcvehgsyvlkpgdrwggssvtnpsyfa pawykvyaqytgdtrwnqvadkcyqiveevkkynngtglvpdwctasgtpasgqsydyky datrygwrtavdyswfgdqrakancdmltkffardgakgivdgytiqgskisnnhnasfi gpvaaasmtgydlnfakelyretvavkdseyygyygnslrlltllyitgnfpnplsdl