TEK (TEK Receptor Tyrosine Kinase): TEK, also known as TIE2, is a receptor tyrosine kinase expressed predominantly in endothelial cells. It plays a crucial role in angiogenesis and the maintenance of blood vessel integrity. TEK signaling is essential for vascular development and has been implicated in various vascular diseases, including venous malformations and angiosarcomas. Its role in angiogenesis also makes it a target for cancer therapy, particularly in tumors where new blood vessel formation is a key factor in growth and metastasis....