Protein molecule that is synthesized on exposure to antigen and that combines specifically with that antigen. A cytotoxic reaction in which killer cells recognize target cells via specific antibodies. A molecule which induces the formation of antibody. A cell which carries antigen in a form that can stimulate lymphocytes.
Macrophage are the most common APCs.
Granules in neutrophils which contain acid hydrolases, myeloperoxidase, and lysozyme. The hindgut organ located in the cloaca of birds that controls the ontogeny of B cells. A complex linked enzyme system that is activated by such factors as the combination of antigen and antibody and that results in a variety of biological responses. The emigration of cells from blood vessels. A factor released by leukocytes which produces fever.