... meta-iodobenzylguanidine;PD128763, 3,4-dihydro-5-methylisoquinoline; PGE2, prostaglandinE2; PI3 -kinase, phosphatidylinositol 3 -kinase; PtdInsP3, phos-phatidylinositol-3,4,5-trisphosphate; PRK, protein kinase ... labeled proteins were detected in quiescent SMC (Fig. 4), however, both the number ofbands and the labeling intensity were increased in growing cells. The most prominent increases were in bands ... response factor (SRF) [30]. Protein kinase C-related kinase 1 (PRK1), also termed protein kinase N (PKN), and PRK2 have been identified as criticalintermediates linking Rho to SRF [31]. Mitogen...