confers_resistance_to_antibiotic enoxacin ciprofloxacin major facilitator superfamily (MFS) antibiotic efflux pump confers_resistance_to_antibiotic norfloxacin ofloxacin Staphylococcus aureus norA antibiotic_resistance ARO:3004667 NorA gene cloned from Staphylococcus aureus conferred relatively high resistance to hydrophilic quinolones such as norfloxacin, enoxacin, ofloxacin, and ciprofloxacin in S. aureus and Escherichia coli. Had low or no resistance at all to hydrophobic ones such as nalidixic acid, oxolinic acid, and sparfloxacin in S. aureus and Escherichia coli. Saur_norA