Specific Immunity

Antibodies, also referred to as immunoglobulins are made by B lymphocytes and are an essential part of specific immunity. There are five general classes of antibodies and each of the large number of antibody molecules responds to a specific foreign molecule called an antigen. Each individual produces millions of different immunoglobins with unique antigen binding sites. This is the result of random pairings of a relatively small number of different heavy and light chains.

Copyright © The McGraw-Hill Companies, inc. Permission required for reproduction or display.