The concentration of total soluble sugars was lower than that of total polysaccharides in the rice bran. A part of cellulose with a high crystallinity and hemicellulose would remain after the enzyme hydrolysis (Kim et al., 1995). A half of the soluble sugars were glucose. A part of other sugars was found to bearabinose by HPLC analysis. The HPLC analysis also showed that the reaction mixture contained no xylose, maltose, or cellobiose but unknown sugars after the
enzymatic saccharification.