Chains and heterogens:
PDB Chain Sequences:
>1nar_ (-) pkpifreyigvkpnsttlhdfpteiintetlefhyilgfaiesyyesgkgtgtfeeswdv elfgpekvknlkrrhpevkvvisiggrgvntpfdpaeenvwvsnakeslkliiqkysdds gnlidgidihyehirsdepfatlmgqlitelkkdddlninvvsiapsennsshyqklyna kkdyinwvdyqfsnqqkpvstddafveifkslekdyhphkvlpgfstdpldtkhnkitrd ifiggctrlvqtfslpgvffwnandsvipkrdgdkpfiveltlqqllaar
>1nar_ (-) pkpifreyigvkpnsttlhdfpteiintetlefhyilgfaiesyyesgkgtgtfeeswdv elfgpekvknlkrrhpevkvvisiggrgvntpfdpaeenvwvsnakeslkliiqkysdds gnlidgidihyehirsdepfatlmgqlitelkkdddlninvvsiapsennsshyqklyna kkdyinwvdyqfsnqqkpvstddafveifkslekdyhphkvlpgfstdpldtkhnkitrd ifiggctrlvqtfslpgvffwnandsvipkrdgdkpfiveltlqqllaa