CD4 receptor

The CD4 receptor is a protein found on the surface of certain immune cells, like helper T cells, which are vital for coordinating the body's immune response. It acts as a marker that allows other immune components to recognize and interact with these cells. Importantly, the HIV virus uses the CD4 receptor as a doorway to enter and infect these cells, which can weaken the immune system if the virus spreads extensively. Understanding the CD4 receptor helps in developing treatments and monitoring immune health, especially in conditions like HIV/AIDS.