DNA / RNA / Protein Dyes
  1. XTT
    Catalog Number 19661

    Useful in in vitro cell growth assays with possible applicability to a variety of problems in cellular pharmacology and biology.

  2. 5-Bromo-4-chloro-3-indolyl β-D-galactopyranoside

    Histochemical substrate for β-galactosidase.


  3. 4’,6-Diamidino-2-phenylindole dihydrochloride (DAPI)

    A cationic fluorescent dye which specifically binds to adenine-thymine-rich DNA. Applications include detection of nanogram quantities of DNA in cellular homogenates, and cytofluorometric determination of the DNA base content in human chromosomes. Available in bulk quantities for OEM users at significant savings.

    λ max 342nm

  4. Pyronin Y, C.I. 45005, certified

    Used in combination with methyl green for the selective and differential staining of nucleic acids. The pyronin Y stains RNA red, while the methyl green stains DNA green. The combined methyl green-pyronin Y stain is a useful histochemical reagent. Pyronin Y can also be used as a tracking dye for polyacrylamide gel electrophoresis.

    λmax 552nm

  5. Acridine orange

    DNA intercalating dye. A grade of acridine orange of exceptionally high purity, suitable for quantitative work. Free of inorganic salts. A specific stain for RNA, used as a 2% solution containing 1% lanthanum acetate in 15% acetic acid.

  6. Filipin (from Streptomyces filipinensis)

    Polyene antibiotic fluorochrome for cholesterol determination. Used as an antifungal agent.

  7. 5-Cyano-2,3-di-(p-tolyl)tetrazolium chloride (CTC)

    Cyanoditolyl tetrazolium chloride has been used to measure the redox activity of tumor cells. It has also been employed for direct epifluorescent microscopic enumeration of respiring bacteria in food samples and environmental samples, especially water samples.

  8. Fast green FCF, C.I. 42053, dye

    (Food green 3). Sensitive stain for proteins in polyacrylamide gels. Especially suitable in isoelectric focusing. Also suitable for use as a cytological counterstain, and mammalian tissue stain for muscle and collagen.

    λ max 622-626nm.

  9. Coomassie® Blue G250, C.I. 42655

    Protein stain for SDS gels. Used in dye binding techniques for protein quantification.

    (Coomassie blue® G250; Brilliant blue G250; Acid blue 90)

    λmax 610nm

  10. Coomassie® blue R250, C.I. 42660

    Rapid acting and sensitive dye for SDS gels.

    (Coomassie blue® R250; Brilliant blue R250; Acid blue 83)

    λmax 588nm

  11. Cibacron Blue, F3GA, C.I. 61211, Affinity Chromatography Grade

    Sulfonated triazine dye that can be immobilized on a support matrix and used for affinity chromatography of proteins. Also used for probing nucleotide binding sites in proteins. (Reactive blue 2)

    1H NMR and mass spectrometry data are consistent with the structure shown.

  12. Stains-all
    Catalog Number 03943

    Used to stain DNA, RNA, and protein. Also useful for staining acid polysaccharides.


    DNA stain blue

    RNA stain bluish-purple

    Protein stain red

  13. Phen-DC3
    Catalog Number 26000
    G-Quadruplex Ligand
  14. Fast Blue
    Fast Blue (FB)
    Catalog Number 17740

    Fast blue fluorescent tracer used in studies of peripheral nervous system to determine the number & origin of neurons projecting to specific area 

  15. Hydroethidine™ (Dihydroethidium bromide)

    Reduced ethidium bromide. A vital stain. Enters and stains living cells without cellular trauma.

  16. Osmium ammine-B
    Osmium ammine-B
    Catalog Number 21033

    Stable DNA stain.

  17. Bisbenzimide (Hoechst 33258)
    Bisbenzimide (Hoechst 33258)
    Catalog Number 09460

    Fluorescent chromosome stain. Recommended use is 10mg/ml for 2-10 minutes. This will vary based on section thickness.

    (2’-[4-Hydroxyphenyl]-5-[4-methyl-1-piperazinyl]-2,5’-bi-1H-benzimidazole trihydrochloride pentahydrate; Hoechst 33258)

  18. 2% Acridine Orange, Ready-to-Use

    DNA intercalating dye. A grade of acridine orange of exceptionally high purity, suitable for quantitative work.

  19. Toluidine blue O, certified by the Biological Stain Commission

    A metachromatic, cationic thiazine dye that is widely used in in vitro biological applications. It has also been used in techniques for DNAase detection.

    λmax 626nm

  20. Ruthenium hexammine trichloride

    Electron microscopy stain.

  21. Acridine mutagen ICR 191
    Acridine mutagen ICR 191
    Catalog Number 08704

    Frameshift mutagenic standard for Ames test in Salmonella and E. Coli.

    ([6-Chloro-9-(3-[2-chloroethylamino]propylamino)-2-methoxyacridine] dihydrochloride; ICR 191 Acridine mutagen; Ames mutagen 191)

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