1FQ5 X-ray structure of a cyclic statine inhibitor PD-129,541 bound to yeast proteinase A Saccharomyces cerevisiae (baker's yeast) 1GVV Five Atomic Resolution Structures of Endothiapepsin Inhibitor Complexes; implications for the Aspartic Proteinase Mechanism ENDOTHIA PARASITICA (CHESTNUT BLIGHT FUNGUS)