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Effect of TCA at sub-concentrations on the expression of penicillin-binding protein 2a (PBP2a) in MRSA (ATCC 33591). Lane 1, the control was treated without TCA; Lane 2-4, PBP2a production after treatment with TCA at 1/8 MIC, 1/4 MIC, and 1/2 MIC, respectively.
