Products

Nucleus Stains

PromoKine offers a wide range of nuclear stains with wavelengths ranging from UV to near infrared. The membrane-permeable stains can be used for live cell staining and the membrane-impermeable stains for fixed or dead cells. Fluorescent dyes with aromatic or guanidine groups interact with nucleic acids by intercalating within the DNA double helix, or by binding to the minor groove. Popular dyes include; orange-fluorescent ethidium bromide (EB), red-fluorescent propidium iodide (PI), green-fluorescent acridine orange (AO) and blue-fluorescent DAPI as well as the Hoechst dyes.  Hoechst dyes can pass through viable cell membranes and DAPI, PI, AO and EB can only penetrate damaged cell membranes (dead cell indicator stains).
These dyes provide excellent counterstains for fluorescence microscopy.

Some of them, (such as the green fluorescent DMAO), can also be used as bacterial stains.

References, Questions & Answers

Product Name Description Size Catalog Number Information Prices
7-AAD (7-aminoactinomycin D) Fluorescent DNA intercalator 1 mg PK-CA707-40037 click to select country
Acridine Orange (AO) Solution Nucleus stain (DNA/RNA) 10 ml PK-CA707-40039 click to select country
DAPI Nucleus stain (DNA) 10 mg PK-CA707-40011 click to select country
DAPI Solution (10 mg/ml) Nucleus stain (DNA); aqueous solution 10 mg PK-CA707-40043 click to select country
DAPI, dilactate 4',6-diamidino-2-phenylindole, dilactate 10 mg PK-CA707-40009 click to select country
DMAO Nucleus stain (DNA); 2 mM solution in DMSO 1 ml PK-CA707-40012 click to select country
EB Solution 10 mg/ml) 10 ml PK-CA707-40042 click to select country
Ethidium Homodimer I Also known as EthD-1, or EtDi 1 mg PK-CA707-40010 click to select country
Ethidium Homodimer I Nucleus stain (DNA); 2 mM solution in DMSO; also known as EthD-1, or EtDi 0.5 ml PK-CA707-40014 click to select country
Ethidium Homodimer III Nucleus stain (DNA); also known as EthD-III 1 mg PK-CA707-40050 click to select country
Ethidium Homodimer III, 1 mM in DMSO Nucleus stain (DNA); in DMSO; also known as EthD-III 200 µl PK-CA707-40051 click to select country
Ethidium Monoazide Bromide (EMA) Fluorescent nucleic acid stain with a photoaffinity label 5 mg PK-CA707-40015 click to select country
Hoechst 33258 Nucleus stain (DNA) 100 mg PK-CA707-40045 click to select country
Hoechst 33258 Solution (10 mg/ml) Nucleus stain (DNA); aqueous solution 10 ml PK-CA707-40044 click to select country
Hoechst 33342 Nucleus stain (DNA) 100 mg PK-CA707-40047 click to select country
Hoechst 33342 Solution (10 mg/ml) Nucleus stain (DNA); aqueous solution 10 ml PK-CA707-40046 click to select country
Propidium Iodide (PI) Dead cell stain (DNA) 100 mg PK-CA707-40016 click to select country
Propidium Iodide (PI) Solution (1 mg/ml) 10 ml PK-CA707-40017 click to select country
Propidium Mono Azide (PMA) High affinity photoreactive DNA binding dye 1 mg PK-CA707-40013 click to select country
Propidium Mono Azide (PMA) Solution PMA Solution, 20 mM in H2O 100 µl PK-CA707-40019 click to select country