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Effect of glnA deletion on aprE-lacZ expression in the scoC and scoC degR background. Cells were grown under the same conditions as described in the legend to Fig. 2. Open circles, OAM157 (scoC); solid circles, AY157G (scoC glnA); open squares, AY157R (scoC degR); solid squares, AY157GR (scoC degR glnA). The data points are the means of values obtained from three determinations. The variations of the enzyme levels among the experiments were within 20%.
