Stains and Dyes

A variety of solutions used to selectively bind to and enhance the visibility of biological structures using color and/or fluorescence; used for histology, protein staining, electrophoresis, bacterial classification, blotting, etc.

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5,896 – 5,910 of 7,093 results

5,896

Biotium NBT (Nitro Blue Tetrazolium, Chloride), 5 g

NBT (Nitro blue tetrazolium, chloride) is an oxidant and is widely used in conjunction with BCIP or BCIP derivatives to detect phosphatase activity. NBT is also a substrate for dehydrogenate and other oxidizes. Thus, it is often used to assess cell viability, proliferation and cytotoxicity, and is also frequently used in histochemistry studies. The colorless NBT is soluble in water, but forms a dark blue-colored, highly insoluble precipitate after being enzymatically reduced. Properties: White solid soluble in water and DMSO; Store at 4°C; C40H30Cl2N10O6; MW: 817.7; [298-83-9]

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5,897

Sigma Aldrich Fine Chemicals Biosciences Quinoline Yellow for microscopy (Hist.), mixture of mono- and disulfonic acid sodium salt | 8004-92-0 | 100G

Quinoline Yellow for microscopy (Hist.), mixture of mono- and disulfonic acid sodium salt | 8004-92-0 | 100G

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5,898

Biotium Lumitein™ PROTEIN GEL STAIN, 1X

Lumitein™ is a luminescent dye designed for detecting proteins in SDS polyacrylamide (SDS-PAGE) gels, but that can also be used to detect proteins in native PAGE gels after an additional SDS incubation step. It is as sensitive as the best silver stain by detecting 1 ng or less protein. Unlike silver stain, however, Lumitein™ has a linear detection range of at least 3 orders of magnitude. Gels can be stained in 90 minutes or less without a separate fixation step. Lumitein™ has an excitation spectrum that makes detection possible with either a simple UV box or fluorescence laser scanner. Moreover, protein gel staining with Lumitein™ is compatible with downstream protein analyses such as mass spectrometry and Edman-based sequencing.

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5,899

Biotium ViaFluor CFSE Cell Proliferation Kit

ViaFluor SE Cell Proliferation Kits use non-toxic, amine-reactive dyes to covalently label cells throughout the cell cytoplasm and intracellular compartments. Cell proliferation dyes are commonly used to monitor cell division by flow cytometry. The dyes also can be used to stably label cells to image cell morphology, or to track cell populations in mixed co-culture experiments. Labeling is covalent, so it withstands fixation and permeabilization for subsequent immunostaining. This kit contains ViaFluor CFSE which has an excitation/emission of 495/519 nm. The kit contains 10 lyophilized dye vials. Each vial is sufficient for 18 uL of 5000X stock solution.

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5,900

Biotium BactoView™ Live Green

BactoView™ Live dyes are fluorogenic live cell bacterial stains. The stains are bright and cell-permeable, they are able to stain both gram-positive and gram-negative bacteria. Stained cells can be detected by fluorescence microscopy or flow cytometry. BactoView™ Live dyes can stain both live and dead bacteria, though dead cells tend to stain a bit brighter than live cells. BactoView™ Live Green can be detected in the FITC channel for flow cytometry and microscopy. Properties: Liquid; Ex/Em= 500/520 nm; Store at 4°C and protect from light.

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5,901

Biotium NucSpot Live 650, 1000X in DMSO

NucSpot Live Cell Nuclear Stains are cell-membrane permeable DNA dyes that specifically stain nuclei in live or fixed cells. They have excellent specificity for DNA without the need for a wash step, and they have low toxicity for live cell imaging. The dyes are supplied as 1000X stock solutions in DMSO, and are supplied with a vial of verapamil, which may increase probe retention and staining in some cell types. NucSpot Live 650 stains nuclei with far-red fluorescence and has an excitation/emission of 650/675 nm for detection in the Cy5 channel. Properties: Ex/Em= 650/675 nm; Store at 4°C and protect from light.

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5,902

Biotium RedDot™1, 200X in water

RedDot™1 is a far-red cell membrane-permeable nuclear dye similar to Draq5™. The dye is ideal for specifically staining the nuclei of live cells. RedDot™1 is highly thermostable and photostable, providing convenient handling for demanding applications such as confocal microscopy. The stain may also be used for DNA content analysis by flow cytometry. The dye has an excitation/emission of 662/694 nm when bound to DNA. Properties: Liquid; Store at 4°C or -20°C, protect from light; Ex/Em= 662/694 nm (with DNA).

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5,903

Biotium Thiazole Red, 1mM in DMSO

Thiazole red, also known as TO-PRO-3, is a cell-impermeant, high-affinity carbocyanine monomeric nucleic acid stain that is essentially nonfluorescent in the absence of nucleic acids but exhibits excitation/emission maxima ~642/661 nm when bound to nucleic acids. Thiazole red is also used as a nuclear counterstain and dead cell indicator. Properties: Blue solution; Ex/Em= 642/661 nm (with DNA); Store at -20°C and protect from light; C26H31I2N3S, MW: 671.42.

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5,904

Biotium DAPI

DAPI (4′,6-Diamidino-2-Phenylindole, dihydrochloride) is a popular blue DNA dye that is used as a nuclear counterstain in fluorescence microscopy, chromosome staining and flow cytometry. The dye binds to the minor groove of dsDNA with approximately 20-fold fluorescence enhancement, with higher affinity for A-T rich regions. DAPI may be used in fixed cells or in live cells at higher concentrations. The dye has an excitation/emission of 358/461 nm. Properties: Yellow solid soluble in water; Store dessicated at 4°C, protect from light; Ex/Em= 358/461 nm (with DNA); C16H17Cl2N5; MW:350.25; [28718-90-3].

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5,905

Cayman Chemical GHRP-6 (acetate), Purity: ≥98%, CAS: 145177-42-0, 50 mg

A synthetic GH secretagogue and an agonist of GHS-R; inhibits binding of the GHS-R agonist MK-0677/ibutamoren (Ki = 1.9 nM) and ghrelin (Kd = 260 nM) to GSH-R type Ia and GSH-R, respectively; stimulates intracellular calcium mobilization (EC50 = 4.5 nM) and inositol phosphate production (EC50 = 0.83 nM) in cells expressing the human receptor; negative allosteric modulator of ghrelin signaling; induces release of GH, but not TSH, LH, or FSH, in isolated rat pituitary gland at 0.03 μg/ml; increases levels of GH, but not TSH, LH, FSH, or prolactin, in rat blood at 50 μg; increases food intake in rats at 0.3, 1, and 3 nmol

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5,906

Cayman Chemical GHRP-6 (acetate), Purity: ≥98%, CAS: 145177-42-0, 5 mg

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5,907

Biotium RedDot™1, 200X in water

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5,908

Biotium Ethidium Homodimer I

Ethidium Homodimer I (EthD-1) is a high-affinity fluorescent nucleic acid stain. It binds to both DNA and RNA in a sequence-independent manner and with a >30-fold fluorescence enhancement. It is useful for detecting nucleic acids in solution, or for selectively staining dead cells with damaged plasma membranes. Biotium offers Ethidium Homodimer I in much higher purity than other manufacturers. The dye has an excitation/emission of 528/617 nm when bound to DNA. Properties: Red solid soluble in water or DMSO; Store dessicated at 4°C, protect from light; Ex/Em = 528/617 nm (with DNA); C46H50Cl4N8; MW:857; [61926-22-5].

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5,909

Biotium Concanavalin A, CF405S Conjugate

This product is fluorescently-labeled concanavalin A (Con A). Con A is a widely used lectin that selectively binds to a-mannopyranosyl and a-glucopyranosy residues, found in the cell wall of yeast and fungi, and the cell membrane of mammalian cells. CF dyes are Biotium's line of next-generation fluorescent dyes with advantages in brightness, photostability, and conjugate specificity compared to other fluorescent dyes. Blue fluorescent CF405S dye has excitation/emission at 404/431 nm.

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5,910

Vector Laboratories Alcian Blue Stain Kit (pH 2.5) 120 ml

This Alcian Blue Stain Kit (pH 2.5) is used for the histological visualization of sulfated and carboxylated acid mucopolysaccharides and sulfated and carboxylated sialomucins (glycoproteins). Alcian Blue Stains acidic sulfated mucosubstances, hyaluronic acid and sialomucins blue, and stains nuclei red. Kit contains 30 ml Alcian Blue Solution (pH 2.5), 30 ml Nuclear Fast Red (Enhanced), and 2 x 30 ml Acetic Acid Solution (3%).

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