>3nkxA (A:) observed residues (from ATOM records)
dknelvqkaklaeqaeryddmaacmksvteqgaelsneernllsvayknvvgarrsswrv
vssieqktegaekkqqmareyrekietelrdicndvlsllekflipnasqaeskvfylkm
kgdyyrylaevaagddkkgivdqsqqayqeafeiskkemqpthpirlglalnfsvfyyei
lnspekacslaktafdeaiaeldtlseesykdstlimqllrdnltlwts