antigens and immunogens

ANTIGENS & IMMUNOGENS
A substance that may be specifically bound by an antibody (Ab) molecule or T cell receptors(TCR) is called an antigen(Ag).When this binding lead to the activation of B cells or T cells ,this substance is known as immunogen. There are some Ag do not induce immune response. So all immunogens are antigens ,but not all antigens are immunogen .

Foreign Substance Binding to immune receptors on B or T cells inducing of immune response

Ag Immunogen
Properties of immunogens:
The ability of a substance to induce immune response is referred to as immunogenicity ,and the substance which induces the immune response is said to be immunogenic .the immune responses induced by an immunogen depend on many factors: