>1xpxA (A:) observed residues (from ATOM records)
sstltpmhlrkaklmffwvrypssavlkmyfpdikfnknntaqlvkwfsnfrefyyiqme
kyarqavteselyrvlnlhynrnnhievpqnfrfvvestlreffraiqggkdteqswkks
iykiisrmddpvpeyfkspnfleq