Purification and properties of alpha-galactosidase isosymes from Phlebia radiata.

Phlebia radiata formed extracellular alpha-galactosidase when it was grown in a culture containing wheat bran or locus bean gum as a carbon source. Their activities were optimal at pH 5.0, and demonstrated the highest level of activity at 60 degrees C. Highly purified isoforms of alpha-galactosidase (AGaS-m1, AGaS-m2, AGaS-m3) isolated from the media with galactomannan and (AGaS-b1, AGaS-b2, AGaS-b3) from the media with wheat bran were obtained by means of the column chromatography on Q-Sepharose and chromatofosussing on Polybuffer Exchanger PBE-94.