Question

By what process is an antigen recruited into a B cell?

Answer 1

Each B cell produces a single species of antibody, each with a unique antigen-binding site to which a specific antigen binds. Antibodies are produced by specialized white blood cells called B lymphocytes (or B cells). When an antigen binds to the B-cell surface, it stimulates the B cell to divide and mature into a group of identical cells called a clone.  B cells recognize their cognate antigen in its native form. The B cell receptor used in recognition can also be secreted to bind to antigens and initiate multiple effector functions such as phagocytosis, complement activation, or neutralization of receptors.