(p < 0.05) effect on the protein yield. The optimum conditions for yeast pretreatment of rice bran protein extraction were achieved at 30oC for 17 h using 3% yeast concentration to obtain a protein yield of 23.37%, which showed no significant difference (p ≥ 0.05) from the response surface methodology predicted protein yield (23.02%). The use of baker’s yeast in the fermentation of rice bran for extraction of protein concentrate can be more effectively used to improve the extraction
yield compared to natural fermented (15.43%) and untreated rice bran (10.16%).
Keywords: Rice bran, fermentation, baker’s yeast, protein extraction, response surface methodol