Chains and heterogens:
PDB Chain Sequences:
>1pgn_ (-) aqadialiglavmgqnlilnmndhgfvvcafnrtvskvddflaneakgtkvlgahsleem vsklkkprriillvkagqavdnfieklvplldigdiiidggnseyrdtmrrcrdlkdkgi lfvgsgvsggedgarygpslmpggnkeawphikaifqgiaakvgtgepccdwvgddgagh fvkmvhngieygdmqliceayhlmkdvlglghkemakafeewnkteldsflieitasilk fqdadgkhllpkirdsagqkgtgkwtaisaleygvpvtligeavfarclsslkderiqas kklkgpqnipfegdkksfledirkalyaskiisyaqgfmllrqaatefgwtlnyggialm wrggciirsvflgkikdafdrnpglqnlllddffksavencqdswrraistgvqagipmp cfttalsfydgyrhamlpanliqaqrdyfgahtyellakpgqfihtnwtghgg