ABS 004-22-02 is specific for complement factor C9. ABS 004-22-02 has been successfully used in ELISA and Western blot procedures. ABS 004-22-02 recognizes C9 in human serum diluted 1:50 in Tris buffer (20 mM Tris-base, 1 mM MgCl2, 1 mM CaCl2 and 140 mM