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. 1999 Jun;181(11):3525–3535. doi: 10.1128/jb.181.11.3525-3535.1999

FIG. 6.

FIG. 6

Demonstration of an inhibitor of oxidative AR produced at pH 8. Cells were grown overnight (18 h) in the media and at the pHs indicated. Treatments included transferring cells to fresh EG (pH 7). In addition, yeast extract (YE; 0.5%) was added directly to overnight cultures immediately prior to acid challenge (less than 1-min exposure). Acid challenge involved diluting cells to 1 × 106 to 3 × 106 CFU/ml in EG (pH 2.5). Results shown indicate survival for 2 h at pH 2.5.