Figure 1.
All life has innate immune mechanisms and jawed vertebrates have the IgSF lymphocyte receptor–based adaptive system as well. Different immune mechanisms with adaptive properties are being discovered in species originally considered to only possess innate immunity.
Table 1.
Examples of adaptive-like immune mechanisms outside of the jawed vertebrates.
Table 2.
Canonical characteristics of immune receptors (adapted from Fig. 3.1 Janeway's Immunobiology 8th ed.) [30].