Chains and heterogens:
PDB Chain Sequences:
>2z1aA (A:) mkrrevlqagmalgglaglgralaqggftltlvhtndthahlepveltlsgektpvggva rrvalfdrvwaraknplfldagdvfqgtlyfnqyrgladryfmhrlryramalgnhefdl gpgpladflkgarfkvvsanvdasreprlkglfapyavvvvggervgiiglttpdtreis npgptvafldpyesaqkavyellakgvnkivvlshlgygedlklarrlvgvqvivgghsh tllgsfphkelspagpyptvvknpegkdvlvvqawewgkvvgllevtfdakgellaykge allmtpeaapedffakeallayaqpvmalmqqviaeakvdlvgeravvrrresnlgnlit dgmlwktrnagtqialqngggirasipkgpitvgkvyevlpfgntlvvmdlkgkeilaal engvsqwentagrflqvsglryafdlsrpagsrvvrvevktekgyvpldleatyrvvvnn fianggdgftvlkeaqgyrvdtgfsdaesfmdylkelkvveaglegrievlnepkgerpa yfayrvpglvgv
>2z1aA (A:) ftltlvhtndthahlepveltlsgektpvggvarrvalfdrvwaraknplfldagdvfqg tlyfnqyrgladryfmhrlryramalgnhefdlgpgpladflkgarfkvvsanvdasrep rlkglfapyavvvvggervgiiglttpdtreisnpgptvafldpyesaqkavyellakgv nkivvlshlgygedlklarrlvgvqvivgghshtllgsfphkelspagpyptvvknpegk dvlvvqawewgkvvgllevtfdakgellaykgeallmtpeaapedffakeallayaqpvm almqqviaeakvdlvgeravvrrresnlgnlitdgmlwktrnagtqialqngggirasip kgpitvgkvyevlpfgntlvvmdlkgkeilaalengvsqwentagrflqvsglryafdls rpagsrvvrvevktekgyvpldleatyrvvvnnfianggdgftvlkeaqgyrvdtgfsda esfmdylkelkvveaglegrievlnep