Antibodies attached to B lymphocytes that act as receptors for antigen are: IgA IgE IgD IgM IgG

Antibodies are the Y shaped proteins that help in signalling to the immune system by attaching to the body of the foreign invaders. It binds in a lock and key manner to the foreign object against which the body's immune system will work. antigen is a substance that helps the body to produce antibodies against the pathogens that enter the body. It is the immune response the body delivers to the foreign invaders. An intigen may b substances like chemicals, bacteria, pollen, virus and so on. Anything that is a foreign object is an antigen to which the antibody of the body binds and helps in its destruction.