E05 478 566 350 170 or Enzyme-Linked Immunosorbent Assays,E05 478 566 350 170 or Enzyme-Linked Immunosorbent Assays,Horse (Equus ferus caballus) sera and plasma contain equine IgGs, Immunoglobulins. ELISA test are used to determine quantitatively the presence in horse serum of the antigen by a polyclonal antibody to the equine epitope selected for the ELISA kit. A blocking solution for the native horse or equine immunoglobulins in available in the ELISA protocol.Immunoglobulin M, or IgM for short, is a basic antibody that is produced by B cells. IgM is by far the physically largest antibody in the human circulatory system. It is the first antibody to appear in response to initial exposure to an antigen