A Palette of Colors Vector Laboratories offers numerous innovative substrates with properties ideal for successful multiple antigen labeling (multiplex IHC): Greater sensitivity than conventional substrates A palette of colors giving an extensive number of color combinations Compatible with HIER (heat induced epitope retrieval) Unique spectral profiles Can be viewed under brightfield, darkfield, fluorescence, or electron microscopy ImmPACT™ DAB HRP Substrate ImmPACT™ SG HRP Substrate ImmPACT™ NovaRED™ HRP Substrate ImmPACT™ VIP HRP Substrate ImmPACT™ Vector® Red AP Substrate Vector® Blue AP Substrate * One per customer. For U.S., U.K. and Canada customers only. While supplies last. More about ImmPACT™ Substrates: Greater sensitivity than conventional DAB powders or tablets Convenient - all reagents in stock solutions, eliminating wait times for mixing and dissolving of powders or tablets Safe handling - reagents provided in dropper bottles Optimized diluent included in all ImmPACT™ Substrates Stable working solutions for ImmPACT™ HRP Substrates (up to 14 days at 4°C) See the following links for further details on relative sensitivities of substrates, enzyme substrate combinations, and a summary of substrate properties. Figure Legend. (L) Breast Carcinoma - rabbit anti-ki67 antibody, ImmPRESS™ Universal Reagent, ImmPACT™ DAB Substrate (brown); mouse anti-CD34 antibody, ImmPRESS™ Universal Reagent, ImmPACT™ VIP HRP Substrate (purple). (M) Breast Carcinoma - mouse anti-estrogen receptor, ImmPRESS™ Universal Reagent, ImmPACT™ NovaRED™ HRP Substrate (red); mouse anti-CD34 antibody, VECTASTAIN® Universal ABC-AP Kit, Vector® Blue AP Substrate (blue). (R) Colon Carcinoma - rabbit anti-S100 antibody, VECTASTAIN® Universal ABC-AP Kit, ImmPACT™ Vector® Red AP Substrate (red); mouse anti-Cytokeratin 8/18 antibody, VECTASTAIN® Universal Elite® ABC Kit, ImmPACT™ SG HRP Substrate (blue/gray).