All Categories
The test strip uses two monoclonal antibodies in each of the to detect the antigen by the principle of double antibody sandwich immunity. One of the specific monoclonal antibodies is conjugated with colloidal gold particle labeling, and the other specific monoclonal antibody is coated on the nitrocellulose membrane (NC membrane). If is present, it will first bind to the gold-labeled antibody to form an antigen-antibody complex. The complex is chromatographed along the NC membrane. When it flows through the test line (T), the antigen-antibody complex binds to the coated antibody at the T line, forming a chromogenic strip at the T line; otherwise, the T line does not develop color. The control line (C line) develops color regardless of the presence of viral antigen. If is present, it will first bind to the gold-labeled antibody to form an antigen-antibody complex. The complex is chromatographed along the NC membrane. When it flows through the test line (T), the antigen-antibody complex binds to the coated antibody at the T line, forming a chromogenic strip at the T line; otherwise, the T line does not develop color. The control line (C line) develops color regardless of the presence of viral antigen.