>2qexB (B:) observed residues (from ATOM records)
pqpsrprkgslgfgprkrstsetprfnswpsddgqpgvqgfagykagmthvvlvndepns
pregmeetvpvtvietppmravalrayedtpygqrpltevwtdefhseldrtldvpedhd
pdaaeeqirdaheagdlgdlrlithtvpdavpsvpkkkpdvmetrvgggsvsdrldhald
ivedggehamndifrageyadvagvtkgkgtqgpvkrwgvqkrkgkharqgwrrrignlg
pwnpsrvrstvpqqgqtgyhqrtelnkrlidigegdeptvdggfvnygevdgpytlvkgs
vpgpdkrlvrfrpavrpndqprldpevryvsnesnqg