Antibodies Explained

Antibodies of the immunoglobulin G class are Y-shaped glycoproteins that circulate in the bloodstream. They bind to and inactivate foreign molecules—the antigens—and mark them for destruction. Each IgG molecule consists of two light chains and two heavy chains. The heavy chains have carbohydrates attached. The regions of the antibody that bind to antigens are located at the very tips of the two arms...