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. 2011 Feb 22;6(2):e17335. doi: 10.1371/journal.pone.0017335

Figure 4. Expression from the fruA promoter in strains expressing various levS mutant genes.

Figure 4

β-Galactosidase activities were measured using various GPS®-LS mutants of levS growing exponentially in TV with 0.5% of glucose or fructose. Each result originates from at least three independent cultures and reports the expression levels of a PfruAΔcre-lacZ fusion (BSCZ). Vector, pMSP3535; levS, pMSP3535 carrying wild-type levS; others, sites of insertion (P59 and P59* have different insertions) or truncation. Asterisks over the bars indicate activities statistically different (P<0.05 by Student's t-test) than those obtained using the strain complemented with a wild-type levS. The results are derived from a minimum of three independent cultures.