Minimum inhibitory concentration (MIC), MIC50, MIC90, and minimum bactericidal concentration (MBC) (μg/ml) of CChHE1 and CChHE2 against Staphylococcus aureus ATCC 6538 and 19 MRSA clinical strains of Staphylococcus aureus obtained by three independent experiments in triplicate (n = 3)