👉 Colicin is a protein that has been identified as an important component of the immune system in humans, specifically in the gastrointestinal tract. It is a type of cytokine and plays a crucial role in regulating inflammation and homeostasis within the body. The exact mechanism by which colicin functions is not fully understood but it is known to play a critical role in various aspects of the immune system, including its ability to modulate the activity of other immune cells and proteins involved in the immune response