FIG. 4.

β-Galactosidase (LacZ) activity resulting from expression of a chromosomal benA::lacZ fusion in strains ACN32, ACN39, ACN41, ACN47, ACN47(pBAC14), and ACN42(pBAC14) (Table 1). Genotypes are noted above bars. Strains were cultured in LB with the inducers indicated. Activities are averages of at least three independent repetitions, and the corresponding standard deviations were <20% of the average value.