>1nf3B (B:) observed residues (from ATOM records)
gamgiqtikcvvvgdgavgktcllisyttnkfpseyvptvfdnyavtvmiggepytlglf
dtagledydrlrplsypqtdvflvcfsvvspssfenvkekwvpeithhcpktpfllvgtq
idlrddpstieklaknkqkpitpetaeklardlkavkyvecsaltqkglknvfdeailaa
leppepkksrrcvl