ET_A

ET_A, or Endoglin (also known as CD105), is a protein found on the surface of certain cells involved in blood vessel formation and repair. It plays a key role in promoting the growth of new blood vessels, especially in areas needing healing or during new tissue growth. Because of its involvement in blood vessel development, ET_A levels are of interest in medical research, particularly in conditions like cancer, where tumors stimulate new blood vessel formation to grow. Measuring ET_A can help understand disease progression or response to treatment related to blood vessel activity.