Abstract
An α-galactosidase for raffinose synthesis by a reverse hydrolysis reaction was searched from intracellular of endophytic fungi. About 500 strains were screened, one strain was selected and identified as Paraphaeosphaeria sp. Partially purified α-galactosidase (1 U/ml in the reaction mixture), 100 g/L galactose, and 500 g/L sucrose at 60 °C for 48 h resulted in synthesis of 13.3 g/L raffinose and 4.6 g/L planteose at a ratio of about 3:1. The data suggest that α-galactosidase was able to synthesize raffinose at a ratio higher than that of α-galactosidases derived from other fungi.
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