Three phase partitioning of β-galactosidase produced by an indigenous Lactobacillus acidophilus isolate

► 7.5 Fold purification of β-galactosidase by single step TPP. ► 21 Fold purification of β-galactosidase by two step TPP. ► β-Galactosidase with double pH optima, at acid (3.0) and neutral pH.