Chains and heterogens:
PDB Chain Sequences:
>1iepA (A:) mdpsspnydkwemertditmkhklgggqygevyegvwkkysltvavktlkedtmeveefl keaavmkeikhpnlvqllgvctreppfyiitefmtygnlldylrecnrqevsavvllyma tqissameylekknfihrdlaarnclvgenhlvkvadfglsrlmtgdtytahagakfpik wtapeslaynkfsiksdvwafgvllweiatygmspypgidlsqvyellekdyrmerpegc pekvyelmracwqwnpsdrpsfaeihqafetmfq
>1iepB (B:) mdpsspnydkwemertditmkhklgggqygevyegvwkkysltvavktlkedtmeveefl keaavmkeikhpnlvqllgvctreppfyiitefmtygnlldylrecnrqevsavvllyma tqissameylekknfihrdlaarnclvgenhlvkvadfglsrlmtgdtytahagakfpik wtapeslaynkfsiksdvwafgvllweiatygmspypgidlsqvyellekdyrmerpegc pekvyelmracwqwnpsdrpsfaeihqafetmfq