>3tt6A (A:) observed residues (from ATOM records)
iysrllkdriimlgsaiddnvansivsqllflaaedpekeislyinspggsitagmaiyd
tmqfikpkvsticigmaasmgafllaagekgkryalpnsevmihqpeiaakrilllrdkl
nkvlaertgqplevierdtdrdnfksaeealeyglidkilth