Chains and heterogens:
PDB Chain Sequences:
>2r7fA (A:) mtqpeltpaqrtevellargradksrvlrdlklpetpeaahalllrlgvwdeartpyadr lraalnavelpvpdfdpaeerldlthlptfaiddegnqdpddavgvedlgggltrlwvhv advaalvapdspldlearargatlylpdrtigmlpdelvakaglglhevspalsicldld pdgnaeavdvlltrvkvqrlayqeaqarleageepfvtlarlarasrrlregegalsidl pevrvkadetgasvfplpkpemrtvvqecmtlagwgtaifaddneiplpfatqdyptrev agdtlpamwarrktlartrfqpspgphhgmgldlyaqatspmrryldlvvhqqlraflag rdplsskvmaahiaesqmnadatrqaerlsrrhhtlrfiaaqpervwdavvvdrrgaqat llipdlafdvqvntpaapgtalqvqfadidlpqmrvrarsvlehhhhhh
>2r7fA (A:) qpeltpaqrtevellargradksrvlrdlklpetpeaahalllrlgvwdeartpyadrlr aalnavelpvpdfdpaeerldlthlptfaiddegnqdpddavgvedlgggltrlwvhvad vaalvapdspldlearargatlylpdrtigmlpdelvakaglglhevspalsicldldpd gnaeavdvlltrvkvqrlayqeaqarleageepfvtlarlarasrrlregegalsidlpe vrvkadetgasvfplpkpemrtvvqecmtlagwgtaifaddneiplpfatqdyptrevag dtlpamwarrktlartrfqpspgphhgmgldlyaqatspmrryldlvvhqqlraflagrd plsskvmaahiaesqmnadatrqaerlsrrhhtlrfiaaqpervwdavvvdrrgaqatll ipdlafdvqvntpaapgtalqvqfadidlpqmrvrarsv