KDR: KDR (also known as VEGFR2) is a gene that plays a central role in angiogenesis — the formation of new blood vessels. It encodes a receptor for vascular endothelial growth factor (VEGF), which is essential for blood vessel growth, development, and repair. Alterations in KDR can influence processes in cancer, where angiogenesis supports tumor growth, as well as in cardiovascular diseases.