<prompt> ABC transpoer ?P. glycoproteinMembrane sparingChannelAdenylyl cyclase  <response>: Ans. isa i.e., P. glycoproteinATP-binding cassette transpoers ABCtranspoers are integral transmembrane proteins that utilize ATP as an energy source to translocate a variety of substrates across membranes.P-glycoprotein is an ATP-binding cassette ABC transpoer and is an impoant factor to limit membrane permeability in several tissues andor elimination pathways into urine rend tubles and bile liver. 