>3v15B (B:) observed residues (from ATOM records)
ltitplspalgaqisgvdisrdisaeerdaieqallqhqvlflrdqpinpeqqarfaarf
gdlhihpiypnvpdtpqvlvldtavtdvrdnavwhtdvtflptpalgavlsakqlpaygg
dtlwasgiaafealsaplremldgltathdftksfplerfgttpqdlarweatrrnnppl
shpvvrthpvsgrkalfvnegfttrinelselesdallrllfahatrpefsirwrwqend
vafwdnrvtqhfavddyrpnrrvmhratilgdapf