Fig 3.

Final cell density of E. coli 83972 and its isogenic mutants in human urine supplemented with the appropriate amino acids and/or nucleobases or complemented with plasmid expressing the defunct gene. Black bars, wild-type E. coli 83972 with and without addition of amino acids and/or nucleobases; white bars, isogenic mutants; light gray bars, isogenic mutants with addition of amino acids and/or nucleobases; dark gray bars, isogenic mutants complemented with plasmids expressing genes corresponding to the defunct gene. Growth characteristics of the isogenic mutants and the corresponding mutant expressing the control vector pACYC184 were identical. Values are means of at least triplicates, and error bars indicate standard errors.