>4xseB (B:) observed residues (from ATOM records)
gelqylkqvddilrygvrkrdrtgigtlslfgmqarynlrnefpllttkrvfwravveel
lwfirgstdskelaakdihiwdiygsskflnrngfhkrhtgdlgpiygfqwrhfgaeykd
cqsnylqqgidqlqtvidtiktnpesrrmiisswnpkdiplmvlppchtlcqfyvangel
scqvyqrsgdmglgvpfniagyalltyivahvtglktgdlihtmgdahiylnhidalkvq
larspkpfpclkiirnvtdindfkwddfqldgynphppl