>1a3cA (A:) observed residues (from ATOM records)
qkavildeqairraltriahemiernkcilvgiktrgiylakrlaerieqiegnpvtvge
iditlyrndeplvkgadipvditdqkvilvddvlytgrtvragmdalvdvgrpssiqlav
lvdrghrelpiradyigkniptsksekvmvqldevdqndlvaiyen