hydrolysis of phosphatidylinositol 4,5-bisphosphate ( pip2 ) via phospholipase c could be activated in untreated pmn membranes by either fmet-leu-phe plus gtp or gtp gamma s alone at low concentrations of ca2+ ( 0.1-1 microm ) .
C0018353
gtp
C0079469
gtp gamma s