>1z3dA (A:) observed residues (from ATOM records)
ttpsrrrlmrdfkklqedppagvsgaptedniltweaiifgpqetpfedgtfklslefte
eypnkpptvkfiskmfhpnvyadgsicldilqnrwsptydvaailtsiqslldepnpnsp
anslaaqlyqenrreyekrvqqiveqswlnf