>5a5kO (O:) observed residues (from ATOM records)
gikvfghpasiatrrvlialheknldfelvhvelkdgehkkepflsrnpfgqvpafedgd
lklfesraitqyiahryetnllqtdsknisqyaimaigmqvedhqfdpvasklafeqifk
siydeavvaeeeaklakvldvyearlkefkylagetftltdlhhipaiqyllgtptkklf
terprvnewvaeitkrpasekvq