>1g21B (B:) SEQRES residues
sqqvdkikasyplfldqdykdmlakkrdgfeekypqdkidevfqwtttkeyqelnfqrea
ltvnpakacqplgavlcalgfektmpyvhgsqgcvayfrsyfnrhfrepvscvsdsmted
aavfggqqnmkdglqnckatykpdmiavsttcmaevigddlnafinnskkegfipdefpv
pfahtpsfvgshvtgwdnmfegiaryftlksmddkvvgsnkkinivpgfetylgnfrvik
rmlsemgvgysllsdpeevldtpadgqfrmyaggttqeemkdapnalntvllqpwhlekt
kkfvegtwkhevpklnipmgldwtdeflmkvseisgqpipasltkergrlvdmmtdshtw
lhgkrfalwgdpdfvmglvkfllelgcepvhilchngnkrwkkavdailaaspygknatv
yigkdlwhlrslvftdkpdfmignsygkfiqrdtlhkgkefevplirigfpifdrhhlhr
sttlgyegamqilttlvnsilerldeetrgmqatdynhdlvr