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YOM36 cells grown in SD medium were transferred to SD medium with pH adjusted to 2.2, 4.0 or 6.0 by NaOH or HCl. Medium pH (A) and cell density (B) of the cultures were measured at the indicated times. Error bars represent the means ± SD (n = 3). (B) P<0.01 (pH 2.2 vs pH 4.0; pH 2.2 vs pH 6.0).
