Fig3: Paraformaldehyde-fixed, paraffin embedded (human gastric carcinoma); Antigen retrieval by boiling in sodium citrate buffer (pH6.0) for 15min; Block endogenous peroxidase by 3% hydrogen peroxide for 20 minutes; Blocking buffer (normal goat serum) at 37℃ for 30min; Antibody incubation with (E2F5) Polyclonal Antibody, Unconjugated at 1:500 overnight at 4℃, followed by a conjugated secondary (sp-0023) for 20 minutes and DAB staining.