Primary and secondary antibodies share a common structure ... the two heavy chains together and each heavy chain to a light chain. The specific structure and combination of these chains allow ...

will react with epitopes on both heavy and light chains, so they will react with other isotypes of primary antibody or different subtypes of IgG. Secondary antibodies that specify a specific isotype ...

Vertebrates with a defined immune system, such as humans, have an immune response consisting of an innate and adaptive response, also known as a specific ... light chains that make up the antibody ...