EL CICLE CEL·LULAR ÉS INDUÏT ALS MAMÍFERS PER FACTORS DE CREIXEMENT Factor Related Family Members Specificity (Broad/Narrow) Representative Actions Platelet-derived growth factor (PDGF) (3 subtypes) Broadstimulate proliferation of connective- tissue cells and some neuroglial cells Epidermal growth factor (EGF) transforming growth factor α (TGF-α ); Lin-3 protein (in C.
{}