confers_resistance_to_drug_class participates_in fluoroquinolone antibiotic confers_resistance_to_drug_class phosphorylation of antibiotic conferring resistance antibiotic inactivation enzyme ciprofloxacin phosphotransferase CrpP ARO:3004467 antibiotic_resistance A class of phosphotransferase enzymes shown to confer resistance to ciprofloxacin by antibiotic inactivation through phosphorylation. The sole example, CrpP, was thought to confer resistance to ciprofloxacin by antibiotic inactivation through phosphorylation, however in the paper by Zubyk & Wright (2021) this was discovered to not be the case. There are no known experimentally validated examples of enzymes with this function.