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a Effect of post-induction time on the expression of the total protein in supernatant at pH 6.0 under 1.0% methanol induction. b Effect of methanol concentration on the expression of the total protein in supernatant at pH 6.0 for 96 h. c Effect of culture medium pH on the expression of the total protein in supernatant for 96 h under 1.0% methanol induction
