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Effects of growth in human urine on fimA, fimB, and fimE expression as determined by using lacZYA transcriptional fusions in strain AAEC189. (A) Different percentages of human urine mixed with LB medium; (B) different pHs of human urine, adjusted with sodium phosphate buffer. The β-galactosidase (β-Gal) activity is expressed in Miller units; means ± standard deviations are indicated.
