>4lfeB (B:) observed residues (from ATOM records)
dklkkidqtihafycekaviseklneavlysinaggkrirpilfleviealqiplteshf
kaaaalemihtgslihddlpamdnddyrrgqltnhkkfdeatailagdslfldafgmlae
tdfptdvtvdlvrslssasgtfgmvggqmldmaaegkklnlknlqlihrhktgqllaypf
waaarvaqldenllatfleigmiiglafqvrddilditanfeeigktpkkdvmaekmtyp
hllglnesyqildesldqaeailrklsdeiafapqkilslierlrlda