Ets-1 is a protein that belongs to the ETS family of transcription factors, which are essential for regulating gene expression. It plays a crucial role in various biological processes, including cell growth, differentiation, and development. Ets-1 is particularly important in the immune system, where it helps control the activity of T cells and B cells. In addition to its role in the immune response, Ets-1 is involved in other functions such as angiogenesis, the formation of new blood vessels, and neurogenesis, the development of nerve cells. Abnormal activity of Ets-1 has been linked to certain diseases, including cancer.