Fig 1. Semi-quantitative expression of PA phnW.
Total RNA was isolated from exponential phase PA PAO1 or its isogenic oxyR mutant. Then, 1 μl of cDNA was used to amplify the phnW promoter region with specific primers. The omlA gene was used as an internal constitutive control [14] and ahpC was used as a positive gene under OxyR control [6].