>4bex1 (1:) observed residues (from ATOM records)
masgvavsdgvikvfndmkvrksstpeevkkrkkavlfclsedkkniileegkeilvgdv
gqtvddpyatfvkmlpdkdcryalydatyetkeskkedlvfifwapesaplkskmiyass
kdaikkkltgikhelqancyeevkdratlaeklggsavislegkpl