Anti-Ig/Px conjugate = conjugation is a binding of two or more substances in the chemical or other reaction. For the immunological test mostly conjugates of animal antibodies against the human immunoglobulin (anti-Ig) with a reaction indicator (in this kit peroxidase (Px)) are used. Other indicators can be also used, such as the fluorescein isothiocyanate (FITC), biotin (BIOT), alkaline phosphatase (AP). As the animal sources for the production of anti-human antibodies goats, pigs, sheep or mouse’s are used.