Figure 1. Key features and functions of the adaptive immune response.
Some key features of the adaptive immune response; see text for description. Circles represent cell types. Arrows indicate direct (one-headed) or bi-directional (double-headed) effects. Dashed lines indicate cell differentiation. Molecules above lines indicate catalyst for effect.
(Abbreviations: IL: interleukin; IFN-γ: interferon-γ; TGF: transforming growth factor; Ig: immunoglobulin; Th: T helper cells; Treg: T regulatory cell.)