the stimulatory effect of pdgf on phosphatidylinositol bisphosphate hydrolysis is not inhibited by pretreatment of nrk cells with pertussis toxin , implying that pdgf-stimulated phospholipase c activity of nrk cells is regulated by a pertussis toxin-insensitive guanine nucleotide-binding protein ( g protein ) that is different from gi ( inhibitory g protein ) or go ( g protein of unknown function ) .
C0007634
nrk cells
C0007595
pdgf