>6fnaB (B:) observed residues (from ATOM records)
mdknelvqkaklaeqaeryddmaacmksvteqgaelsneernllsvayknvvgarrsswr
vvssieqkteekkqqmareyrekietelrdicndvlsllekflipnasqaeskvfylkmk
gdyyrylaevaagddkkgivdqsqqayqeafeiskkemqpthpirlglalnfsvfyyeil
nspekacslaktafdeaiaeldtlseesykdstlimqllrdnltlwt