>3r3uB (B:) observed residues (from ATOM records)
ghmpdladlfpgfgsewintssgrifarvggdgppllllhgfpqthvmwhrvapklaerf
kvivadlpgygwsdmpesdeqhtpytkramakqlieameqlghvhfalaghdrgarvsyr
laldspgrlsklavldilptyeywqrmnrayalkiyhwsflaqpaplpenllggdpdfyv
kaklaswtragdlsafdpravehyriafadpmrrhvmcedyragayadfehdkidveagn
kipvpmlalwgapldvwrkwasdvqgapiesghflpeeapdqtaealvrffsaa