Mouse anti-FK-506 monoclonal antibody for ELISA. Suitable for use in ELISA. Each laboratory should determine an optimum working titer for use in its particular application. Other applications have not been tested but use in such assays should not necessarily be excluded.Tacrolimus(also FK-506 or Fujimycin) is an immunosuppressive drug that is mainly usedafter allogeneic organ transplant to reduce the activity of the patient"simmune system and so lower the risk of organ rejection. It is also used in atopical preparation in the treatment of severe atopic dermatitis (eczema),severe refractory uveitis after bone marrow transplants, and the skincondition vitiligo.