Fig. 4From: Optimization and partial purification of beta-galactosidase production by Aspergillus niger isolated from Brazilian soils using soybean residuea SDS-PAGE of partially purified β-galactosidase. Lane 1: Molecular mass markers, mass indicated alongside. Lane 2: S-200 peak. Lane3: DEAE peak. b β-galactosidase activity zymogram from DEAE peakBack to article page