>1a2xA (A:) observed residues (from ATOM records)
dqqaearsylseemiaefkaafdmfdadgggdisvkelgtvmrmlgqtptkeeldaiiee
vdedgsgtidfeeflvmmvrqmkedakgkseeelaecfrifdrnadgyidaeelaeifra
sgehvtdeeieslmkdgdknndgridfdeflkmmegvq