>2fz4A (A:) observed residues (from ATOM records)
iaeiyyergtivvkgdahvphakfdsrsgtyralafryrdiieyfesngiefvdnaadpi
ptpyfdaeislrdyqekalerwlvdkrgcivlptgsgkthvamaainelstptlivvptl
alaeqwkerlgifgeeyvgefsgrikelkpltvstydsayvnaeklgnrfmllifdevhh
lpaesyvqiaqmsiapfrlgltatfe