3.4.23.19 - 649935 3.4.23.19 Aspergillus niger var. macrosporus 30578 3.4.23.19 purified enzyme, 100 mg/ml protein in 1.4 M ammonium sulfate, 5% v/v dimethyl sulfoxide, 50 mM glycine, pH 2.1, hanging drop vapour diffusion method, X-ray diffraction structure determination and analysis at 1.4 A resolution, modeling 670653