>1xygB (B:) observed residues (from ATOM records)
kdirigllgasgytgaeivrllanhphfqvtlmtadrkagqsmesvfphlraqklptlvs
vkdadfstvdavfcclphgttqeiikelptalkivdlsadfrlrniaeyeewygqphkav
elqkevvyglteilredikkarlvanpgcypttiqlplvpllkanlikheniiidaksgv
sgagrgakeanlyseiaegissygvtrhrhvpeieqglsdvaqskvtvsftphlmpmirg
mqstiyvemapgvrtedlhqqlktsyedeefvkvldegvvprthnvrgsnychmsvfpdr
ipgraiiisvidnlvkgasgqalqnlnimlgypettgllhqplfp