3.2.1.82	structure of an in a native form (solved to 2.19 A resolution) and a digalacturonic acid product complex (solved to 2.10 A resolution). The enzyme is crystallized in space group P2(1) by the hanging-drop, vapor-diffusion method at 18°C in 20% (w/v) PEG 4000, 0.1 M nickel sulfate, 0.1 M sodium acetate, pH 4.2