. "Catalysis of the reaction: ATP + H2O + xenobiotic(in) = ADP + phosphate + xenobiotic(out)." . . . . "P-glycoprotein" . "multidrug resistance exporter" . "xenobiotic-transporting ATPase activity" . "ATP phosphohydrolase (steroid-exporting)" . "ATP phosphohydrolase (xenobiotic-exporting)" . "MDR protein" . "multidrug-resistance protein" . "PDR protein" . "pleiotropic-drug-resistance protein" . "steroid ABC transporter" . "steroid-transporting ATPase activity" . "xenobiotic ABC transporter" . . . . .