Immune repertoire

The immune repertoire, is defined as, the number of different sub-types an organism's immune system makes, of any of the 6 key types of protein, either immunoglobulin or T cell receptor.

In most vertebrates, immune systems have 6 key types of proteins, which help the immune system recognise viruses, germs, etc. The 6 main types are: immunoglobulins (2), and T cell receptors (4). Immunoglobulin proteins consist of 2 parts, a light chain and a heavy chain. T cell receptors come in 4 types, labelled alpha, beta, gamma and delta.