DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Cd28 antigen molecule. Computer model showing the secondary structure of cd28. Cd28 is an antigen found on the surface of T cells, a type of white blood cell and a component of the body's immune system. Stimulation of cd28 by other cells of the immune system is required for the activation of T cells in an immune response.
Model release not required. Property release not required.