(kloh-nul) The mechanism that determines specificity and accounts for antigen memory in the immune system; occurs because an antigen introduced into the body selectively activates only a tiny fraction [..]

Vineyard management term for a technique by which dead or under-performing vines are replaced with new vines grown from a single superior vine, or mother vine.

Lymphocyte Activation by a specific Antigen thus triggering clonal expansion of Lymphocytes already capable of mounting an immune response to the Antigen.

A process whereby cells that already have antibodies specific to an antigen on their surfaces are stimulated to proliferate and secrete that antibody.