ingredient information
Immunoglobulins, or antibodies, are a complex, heterogeneous mixture of proteins that exhibit two fundamental types of structural variation. Subtle structural differences in their antigen combining sites, or variable regions, account for their unique antigen binding specificities (see Figure 4-3). Structural differences outside their antigen combining sites, in the so-called constant regions, correlate with the different effector functions mediated by antibodies, such as complement activation or binding to one or more of the antibody Fc receptors expressed on monocytes and granulocytes. Antibody proteins are often called immunoglobulins ( Ig). All immunoglobulin molecules have many common structural features…The antibodies are made of protein "chains" linked together by chemical bonds. There are "heavy" chains and "light" chains. I will spare you the intricacies of the detailed description of these chains Source: