Chains and heterogens:
PDB Chain Sequences:
>1pxbA (A:) mktqvaiigagpsglllgqllhkagidnvilerqtpdyvlgriragvleqgmvdllreag vdrrmardglvhegveiafagqrrridlkrlsggktvtvygqtevtrdlmeareacgatt vyqaaevrlhdlqgerpyvtferdgerlrldcdyiagcdgfhgisrqsipaerlkvferv ypfgwlglladtppvshelifanhprgfalcsqrsatrsryyvqvplsekvedwsderfw telkarlpsevaeklvtgpsleksiaplrsfvvepmqhgrlflagdaahivpptgakgln laasdvstlyrlllkayregrgellerysaiclrriwkaerfswwmtsvlhrfpdtdafs qriqqteleyylgseaglatiaenyvglpyeeie