K2b is a type of protein that plays a crucial role in the immune system. It is involved in the regulation of various immune responses, helping the body to fight off infections and diseases. This protein is particularly important in the functioning of T cells, which are essential for adaptive immunity. Research on K2b has shown its potential in therapeutic applications, especially in enhancing immune responses in patients with weakened immune systems. Understanding K2b can lead to advancements in treatments for conditions like autoimmune diseases and cancer, where the immune system's function is compromised.