Purity >90 as determined by SDS-PAGE. Connective tissue growth factor (CTGF) is a mitogen that is secreted by vascular endothelial cells in response to basic fibroblast growth factor (bFGF) or vascular endothelial growth factor (VEGF). CTGF promotes cell growth, migration, adhesion, and survival of endothelial cells. CTGF is also important during osteogenesis, chondrogenesis, and skeletogenesis. CTGF has an insulin-like growth factor binding protein (IGFBP) domain, a thrombospondin type 1 repeat (TSR) domain, and a C-terminal cysteine knot motif.