An x-ray crystallographic study of the rennin-like enzyme of Endothia parasitica.

Single crystals of a protease obtained from the fungus Endothia parasitica have been grown and studied by X-ray diffraction. Three crystal forms, types I, II and III, can be produced; two of these, types I and II, are in space group P21, both with 2 molecules per cell, and having unit cell dimensions, respectively, of a = 53.5 A, b = 74.2 A, c = 45.6 A, β = 109 ° 5′ and a = 55.6 A, b = 60.1 A, c = 45.8 A, β = 101 ° 45′.