>3tt6B (B:) observed residues (from ATOM records)
iysrllkdriimlgsaiddnvansivsqllflaaedpekeislyinspggsitagmaiyd
tmqfikpkvsticigmaasmgafllaagekgkryalpnsevmihqpeiaakrilllrdkl
nkvlaertgqplevierdtdrdnfksaeealeyglidkilth