Antibody molecules, or “immunoglobulins”, have been recognized only in vertebrates and all are found to have a fundamentally similar structure consisting of two heavy and two light peptide chains.

The axon is surrounded by multilamellar structure of myelin ... Myelin segments are stained in red by an antibody to myelin basic protein, a molecule specifically expressed in myelin.

These range from early, basic research on the structure of antibodies and their targets to detailed evaluation of the level of protection they provide to human volunteers in clinical trials.