IL4 antibody [IL4-II] (Biotin) Cat. No. GTX02994-02 Cat. No. GTX02994-02 GTX02994-02 ELISA Image Sandwich ELISA analysis of human IL-4 protein using GTX02993 IL4 antibody [IL4-I] as coating antibody and GTX02994-02 IL4 antibody [IL4-II] (Biotin) as detecting antibody. See all IL4 products