>1s3zA (A:) observed residues (from ATOM records) shmdirqmnkthlehwrglrkqlwpghpddahladgeeilqadhlasfiamadgvaigfa dasirhdyvngcdsspvvflegifvlpsfrqrgvakqliaavqrwgtnkgcremasdtsp entisqkvhqalgfeetervifyrkrc