>6i73B (B:) observed residues (from ATOM records)
avsdeeanlfamqlasasvlpmvlkaaieldlleimakagpgsflspsdlasqlptknpe
apvmldrmlrllasysiltcslrtlpdgkverlyclgpvckfltknedgvsiaalclmnq
dkvlveswyhlkdavldggipfnkaygmtafdyhgtdprfnkvfnkgmadhstitmkkil
etykgfeglksivdvgggtgavvnmivskypsikginfdlphviedapqypgvqhvggdm
fvsvpkgnaifmkwichdwsdehcikflkncyaalpddgkvilaecilpvapdtslatkg
vvhmdvimlahnpggkerteqefealakgsgfqgirvccdafntyvieflkki