Seniors

1. Basics of antigen-antibody Antigen are protein, polysaccharide or lipid. Antibodies are proteins produced and secreted by B cells (lymphocytes) in response to presence of antigen-pathogen Antibodies are present on the surface of B cells (surface immunoglobulins) serving as antigen receptors or are secreted into the extracellular space where they can bind and neutralize [...]