Shop All Cell Growth and Differentiation Reagents and Kits

Product Type


Species


CellTrace™ Oregon Green™ 488 Carboxylic Acid Diacetate, Succinimidyl Ester (Carboxy-DFFDA, SE), cell permeant, mixed isomers Invitrogen™

Like CFDA SE, CellTrace™ Oregon Green® 488 (carboxy-DFFDA SE) should be a useful tool for following proliferating cells. This Oregon Green® 488 probe passively diffuses into cells, where it is colorless and nonfluorescent until its acetate groups are removed by intracellular esterases to yield a highly fluorescent, amine-reactive dye. Upon reaction with intracellular amines, the probe forms Oregon Green® 488 conjugates that are well-retained by cells. Unlike fluorescein conjugates, Oregon Green® 488 conjugates exhibit bright, photostable green fluorescence that is independent of pH at typical cellular pH values (pH-6-8).

EnzChek™ Ultra Xylanase Assay Kit Invitrogen™

The EnzChek® Ultra Xylanase Assay Kit features a quick and convenient mix-and-read format for the detection and monitoring of xylanase activity. The increase in fluorescence resulting from xylanase activity is measured using a fluorometer or fluorescence microplate reader.

See our complete line of Fluorescence Microplate assays.

• Detect concentrations of xylanase activity as low as 1.5 mU/mL
• Suitable for a broad pH range (pH 4 to 10)
• Format allows for continuous detection of xylanase activity
• Excitation/emission maxima of ~358/455 nm, well suited for DAPI filter settings

The EnzChek® Ultra Xylanase Assay Kit provides the speed, sensitivity, and convenience required for measuring xylanase activity or for screening xylanase inhibitors in a high-throughput format. The hydrolysis of xylosidic linkages within the included Xylanase Substrate (hemicellulose polysaccharides) results in the unquenching of the attached fluorescent dyes. This kit can be used for continuous detection of xylanase activity, and offers broad dynamic and pH ranges. Each kit contains sufficient substrate for ~500 assays in a 96-well microplate format. Additionally, the kit contains a fluorescent reference standard that can be used to quantify the xylanase activity.

Amplex™ Red Phospholipase D Assay Kit Invitrogen™

The Amplex® Red Phospholipase D Assay Kit provides a sensitive and simplemethod to detect Phospholipase D (PLD) activity using a fluorescence microplate reader or fluorometer.

See our complete line of Fluorescence Microplate assays.

• Detect phospholipase D activity levels as low as 10 U/mL
• Format allows for multiple time point measurements
• Designed for minimal autofluorescence interference

PLD activity is monitored indirectly using 10-acetyl-3,7-dihydroxyphenoxazine (Amplex® Red reagent), a sensitive fluorogenic probe for hydrogen peroxide. PLD converts the phosphatidylcholine (lecithin) to choline, which is then oxidized by choline oxidase to betaine and hydrogen peroxide. In the presence of horseradish peroxidase, huydrogen peroxide reacts with the Amplex® Red reagent in a 1:1 stoichiometric ratio to generate the highly fluorescent product resorufin.

Because resorufin has absorption and fluorescence emission maxima of approximately 571 nm and 585 nm, respectively, there is little interference from autofluorescence in most biological samples.

Use Amplex® Red Assays for a Broad Range of Investigations
A wide variety of validated Amplex® Red assays are available for studying cell signaling and lipids, neurobiology, inflammation and immune function, and metabolism. We also offer Amplex® UltraRed Reagent (Cat. No. A36006), a second-generation reagent providing greater sensitivity and brighter fluorescence, and the Amplex® Red/UltraRed Stop Reagent (Cat. No. A33855). The Amplex® Red/UltraRed Stop Reagent provides convenience and control by allowing the fluorescence signal-generating reaction to be terminated at a user-determined time point. After addition of the stop reagent, the fluorescence signal remains stable for at least three hours. Custom assay design and packaging are also available.

CellMask™ Green Actin Tracking Stain Invitrogen™

Invitrogen CellMask Green Actin Tracking Stain fluorescently labels polymerized/filamentous actin (F-actin) in live or fixed cells. It is designed to readily permeate live cells, thus providing more uniform and bright labeling. CellMask Green Actin Tracking Stain can be used to track F-actin in live cells for 24 hours or more. Live cells stained with CellMask Green Actin Tracking Stain can be fixed, or it can be used with fixed cells. And the stain can be used for multiplexing with antibodies in immunofluorecence (IF), immunocytochemistry (ICC), and immunohistochemistry (IHC) protocols.

Features of Cell Mask Green Actin Tracking Stain include:
• Stains F-actin in live or fixed cells for fluorescence imaging
• Can be multiplexed with antibodies in IF/ICC/IHC experiments
• Fluorescence maxima: Ex 503 nm/Em 512 nm; can be detected with FITC/GFP filter

Selection guide for cellular cytoskeleton staining probes

CellMask actin tracking stains are available in three colors: green (Cat. No. A57246) detected with a FITC/GFP filter (Ex 503 nm/Em 512 nm), orange (Cat. No. A57247) detected with a TRITC/RFP filter (Ex 545 nm/Em 570 nm), and red (Cat. No. A57248) detected with a CY5/Deep Red filter (Ex 652 nm/Em 669 nm). Excitation and emission spectra of all three stains are provided below.

CellMask actin tracking stains detect F-actin with a targeting structure that closely resembles jasplakinolide. They do not label globular actin (G-actin) or monomer actin (M-actin). CellMask actin tracking stains easily pass through live cell membranes and are retained within live cells after loading. As demonstrated in the figures below, incubation with CellMask actin tracking stains has no detectable effect on viability of various cell lines after 24 hours of incubation.

CellMask actin tracking stains detect F-actin in live cells or tissue, which can then be fixed. In addition, CellMask actin tracking stains can be used to detect F-Actin in paraformaldehyde fixed cells or tissue (freshly fixed or cryo frozen only) and can be multiplexed with antibody detection. CellMask actin tracking stains can also be used in 3D cell culture for 3D imaging.

EnzChek™ Ultra Amylase Assay Kit Invitrogen™

The EnzChek® Ultra Amylase Assay Kit provides a solution-based assay featuring the speed, high sensitivity, and convenience required for measuring amylase activity or for screening amylase inhibitors in a high-throughput format. This EnzChek® kit contains a starch derivative—the DQ™ starch substrate—that is labeled with BODIPY® FL dye to such a degree that the fluorescence is quenched. This substrate is efficiently degraded by amylase; digestion relieves the quenching and yields highly fluorescent fragments. The accompanying increase in fluorescence is proportional to amylase activity and can be monitored with a fluorescence microplate reader or fluorometer, using standard fluorescein filters.

EnzChek® Ultra Amylase Assay Kit Specifications:
• Label (Ex/Em): BODIPY® FL conjugate (~502/512 nm)
• Kit contains lyophilized substrate, 10X reaction buffer, substrate solvent, a fluorescent standard, and a detailed protocol
• Sufficient reagents are supplied for 500 assays (using a 100 µL assay volume in a 96-well microplate assay format)


Find Fluorescent Substrates for Other Glycosidases
In addition to the EnzChek® Ultra Amylase Assay Kit, we offer kits and substrates to measure xylanase, lysozyme, β-galactosidase, and more. Review Detecting Glycosidases—Section 10.2 in the Molecular Probes® Handbook for more information on these products.

For Research Use Only. Not for human or animal therapeutic or diagnostic use.

CyQUANT™ Cell Proliferation Assay, for cells in culture Invitrogen™

The CyQUANT® Cell Proliferation Assay is a highly sensitive fluorescence-based method for quantifying cells and assessing cell proliferation and cytotoxicity. For cell proliferation assays that are more compatible with high throughput screening, see our CyQUANT® NF Cell Proliferation Assay or our CyQUANT® Direct Assay.

With the CyQUANT® Cell Proliferation Assay, you can:

• Measure DNA content to directly quantify 50 to 50,000 cells per well without relying on metabolic activity
• Quickly compare multiple samples in a simple plate-based assay format
• Freeze and store time course samples for later analysis

Measure DNA content directly
The main component of the CyQUANT® Cell Proliferation Assay is CyQUANT® GR, a proprietary dye that exhibits strong fluorescence enhancement when bound to nucleic acids. With this dye, you can measure a sample's DNA content and compare it to standards, directly quantifying the entire cell population within a broad linear detection range. This method offers improved accuracy over metabolically based cell proliferation or cytotoxicity assays that can be influenced by cell changes that are unrelated to cell number.

Quickly compare multiple samples
The CyQUANT® Cell Proliferation Assay requires minimal hands-on time. Simply remove the culture media, freeze and lyse cells, then read fluorescence on a standard microplate reader with a fluorescein filter.

Store samples for later analysis
Because the cells are frozen, samples can stored for up to 4 weeks and run in batches, allowing the direct comparison of samples taken at different time points.

Kit components
The kit includes CyQUANT® GR dye and cell lysis buffer sufficient to perform 1,000 assays in volumes suitable for fluorescence detection in microplates. The kit also contains bacteriophage λ DNA to be used as a reference standard for assay calibration.

MUP (4-Methylumbelliferyl Phosphate, Free Acid) Invitrogen™

MUP is a fluorescent substrate for alkaline phosphatases. Alkaline phosphatase mediated hydrolysis of its phosphate substituent yields the blue-fluorescent 4-methylumbelliferyl (excitation/emission ~386/448 nm).

Amplex™ Red Sphingomyelinase Assay Kit Invitrogen™

The Amplex® Red Sphingomyelinase Assay Kit provides a sensitive, rapid, and simple fluorometric method for detecting very low concentrations of sphingomyelinase using a fluorescence microplate reader or fluorometer.

See our complete line of Fluorescence Microplate assays.

• Detects sphingomyelinase activity levels as low as 80 µU/mL in a 200 µL assay volume
• Format allows for multiple time point measurements
• Designed for minimal autofluorescence interference

In this enzyme-coupled assay, sphingomyelinase activity is monitored indirectly using 10-acetyl-3,7-dihydroxyphenoxazine (Amplex® Red reagent), a sensitive fluorogenic probe for hydrogen peroxide. Sphingomyelinase hydrolyses the sphingomyelin to yield ceramide and phosphorylcholine. Alkaline phosphatase is added, which hydrolyzes phosphorylcholine to form choline. The choline is then oxidized by choline oxidase to form betaine and hydrogen peroxide. In the presence of horseradish peroxidase, the hydrogen peroxide reacts with Amplex® Red reagent in a 1:1 stoichiometric ratio to generate the highly fluorescent product resorufin.

Because resorufin has absorption and fluorescence emission maxima of approximately 571 nm and 585 nm, respectively, there is little interference from autofluorescence in most biological samples.

Use Amplex® Red Assays for a Broad Range of Investigations
A wide variety of validated Amplex® Red assays are available for studying cell signaling and lipids, neurobiology, inflammation and immune function, and metabolism. We also offer Amplex® UltraRed Reagent (Cat. No. A36006), a second-generation reagent providing greater sensitivity and brighter fluorescence, and the Amplex® Red/UltraRed Stop Reagent (Cat. No. A33855). The Amplex® Red/UltraRed Stop Reagent provides convenience and control by allowing the fluorescence signal-generating reaction to be terminated at a user-determined time point. After addition of the stop reagent, the fluorescence signal remains stable for at least three hours. Custom assay design and packaging are also available.

CellMask™ Orange Actin Tracking Stain Invitrogen™

Invitrogen CellMask Orange Actin Tracking Stain fluorescently labels polymerized/filamentous actin (F-actin) in live or fixed cells. It is designed to readily permeate live cells, thus providing more uniform and bright labeling. CellMask Orange Actin Tracking Stain can be used to track F-actin in live cells for 24 hours or more. Live cells stained with CellMask Orange Actin Tracking Stain can be fixed, or it can be used with fixed cells. And the stain can be used for multiplexing with antibodies in immunofluorecence (IF), immunocytochemistry (ICC), and immunohistochemistry (IHC) protocols.

Features of Cell Mask Orange Actin Tracking Stain include:
• Stains F-actin in live or fixed cells for fluorescence imaging
• Can be multiplexed with antibodies in IF/ICC/IHC experiments
• Fluorescence maxima: Ex 545 nm/Em 570 nm; can be detected with TRITC/RFP filter

Selection guide for cellular cytoskeleton staining probes

CellMask actin tracking stains are available in three colors: green (Cat. No. A57246) detected with a FITC/GFP filter (Ex 503 nm/Em 512 nm), orange (Cat. No. A57247) detected with a TRITC/RFP filter (Ex 545 nm/Em 570 nm), and red (Cat. No. A57248) detected with a CY5/Deep Red filter (Ex 652 nm/Em 669 nm). Excitation and emission spectra of all three stains are provided below.

CellMask actin tracking stains detect F-actin with a targeting structure that closely resembles jasplakinolide. They do not label globular actin (G-actin) or monomer actin (M-actin). CellMask actin tracking stains easily pass through live cell membranes and are retained within live cells after loading. As demonstrated in the figures below, incubation with CellMask actin tracking stains has no detectable effect on viability of various cell lines after 24 hours of incubation.

CellMask actin tracking stains detect F-actin in live cells or tissue, which can then be fixed. In addition, CellMask actin tracking stains can be used to detect F-Actin in paraformaldehyde fixed cells or tissue (freshly fixed or cryo frozen only) and can be multiplexed with antibody detection. CellMask actin tracking stains can also be used in 3D cell culture for 3D imaging.

Thapsigargin Invitrogen™

Thapsigargin is a naturally occurring sesquiterpene lactone isolated from the umbelliferous plant Thapsia garganica. This tumor promoter releases Ca2+ from intracellular stores by specifically inhibiting the endoplasmic reticulum Ca2+-ATPase; it does not directly affect plasma membrane Ca2+-ATPases, Ins 1,4,5-P3 production or protein kinase C activity. Thapsigargin is also available in a 1 mg packaging, T7458.

RediPlate™ 96 EnzChek™ Serine/Threonine Phosphatase Assay Kit Invitrogen™

The RediPlate™ 96 EnzChek® Serine/Threonine Phosphatase Assay Kit provides a fast, simple and direct fluorescence-based assay for detecting serine/threonine phosphatases and their corresponding modulators and inhibitors. Unlike other microplate assays, this kit provides the necessary reagents predispensed into a 96-well microplate. Simply reconstitute the fluorogenic substrate in the assay wells with buffer, add the desired sample to the wells, incubate and then quantitate the fluorescence in any standard fluorescence-based microplate reader. Inhibitors are included in each assay well to ensure that the assay is selective for Ser/Thr PPases- other phosphatases, including tyrosine phosphatase do not significantly react with the substrate. Additional advantages of this assay include compatibility with non-ionic detergents and insensitivity to free phosphate.

MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) Invitrogen™

MTT is used to assess cell viability as a function of redox potential. Actively respiring cells convert the water-soluble MTT to an insoluble purple formazan. The formazan is then solubilized and its concentration determined by optical density.

Click-IT™ AHA (L-Azidohomoalanine) Invitrogen™

Click-iT® AHA (L-azidohomoalaine) provides a fast, sensitive, non-toxic and most importantly non-radioactive alternative to the traditional radioactive technique, 35S-methionine for the detection of nascent protein. AHA is an amino acid analog that contains a very small modification, specifically an azido moiety that can be fed to cultured cells and incorporated into proteins during active protein synthesis. Detection utilizes the chemoselective ligation or “click " reaction between an azide and an alkyne where the azido modified protein is detected with one of the Click-iT® Protein Analysis Detection Kits containing either TAMRA, Dapoxyl®, or biotin alkyne. Detection sensitivity with these reagents in 1-D gels and Western blots is in the low femtomole range and compatible with downstream LC-MS⁄MS and MALDI MS analysis or Multiplexed Proteomics® reagents for differential analyses of newly synthesized proteins together with total glycoproteins, total phosphoproteins or total protein.

Click-iT™ EdU Cell Proliferation Kit for Imaging, Alexa Fluor™ 594 dye Invitrogen™

The Click-iT EdU Cell Proliferation Kit for Imaging is a superior alternative to traditional proliferation assays that is optimized for fluorescence microscopy applications. In this assay the modified thymidine analogue EdU is efficiently incorporated into newly synthesized DNA and fluorescently labeled with a bright, photostable Alexa Fluor® dye in a fast, highly-specific click reaction. This fluorescent labeling of proliferating cells is accurate and compatible with antibody methods due to the mild click protocol.

• Simple—works the first time, every time, in less time
• Efficient—no denaturation steps or harsh treatment required
• Content-rich results—better preservation of cell morphology, antigen structure, and DNA integrity
• Consistent—not dependent on variable antibody lots for detection

The most accurate proliferation-detection methods are based on the incorporation and measurement of nucleoside analogues in newly synthesized DNA, with bromodeoxyuridine (BrdU) a commonly used analogue. BrdU-labeled DNA is quantitated using anti-BrdU antibodies following DNA denaturation by harsh methods (HCl, heat, or enzymes) to expose the BrdU molecules. This step is time consuming and difficult to perform consistently. The harsh treatment can also adversely effect sample integrity and quality, which makes co-staining with other antibodies challenging.

Superior Proliferation Methodology
The Click-iT EdU Cell Proliferation Kit for Imaging provides a superior alternative to BrdU assays for measuring cell proliferation. EdU (5-ethynyl-2'-deoxyuridine) is a nucleoside analog of thymidine and is incorporated into DNA during active DNA synthesis. With Click-iT® EdU, mild fixation and detergent permeabilization is sufficient for the small molecule-based Click-iT® EdU detection reagent to gain access to the DNA. As a consequence, the Click-iT® EdU imaging kit is not only easy to use, but more accurate and compatible with cell cycle analysis and other intracellular or extracellular targets for truly content-rich results.

This kit is optimized for fluorescence microscopy applications; visit the Click-iT® technology area of our website for kits designed for high-content imaging, fluorescence microplate, or flow cytometry platforms.

Learn more about Click-iT technology >
Find more tools for image-based detection of proliferating cells >

Notes:
The Click-iT® assay can be used on cells in culture or in vivo following EdU administration by feeding or injection methods.
The Click-iT® assay can be used with BrdU in dual pulse experiments by using the anti-BrdU (clone MoBu-1) antibody, which does not cross react with EdU.
The Click-iT® technology is compatible with immunohistochemical, immunocytochemical, and fluorescent dyes that are fixation tolerant or designed for fixed cell labeling.

alamarBlue™ Cell Viability Reagent Invitrogen™

alamarBlue Cell Viability Reagent is a ready-to-use resazurin-based solution that functions as a cell health indicator by using the reducing power of living cells to quantitatively measure viability. Resazurin, the active ingredient of alamarBlue reagent, is a non-toxic, cell-permeable compound that is blue in color and virtually non-fluorescent. Upon entering living cells, resazurin is reduced to resorufin, a compound that is red in color and highly fluorescent. Changes in viability can be easily detected using either an absorbance- or fluorescence-based plate reader. alamarBlue Cell Viability Reagent has broad applicability and can be used with various human and animal cell lines, bacteria, plant, and fungi.

Features include:
• Robust and reliable performance—results in a large, highly reproducible dynamic range
• Highly sensitive reagent with a linear response—detects as few as 50 cells per well
• Convenient add-and-read format—no mixing, no washing, no cell lysis
• Compatible with either fluorescence- or absorbance-based instrumentation
• Measures viability from many diverse cell types—including mammalian cells, bacteria, plant, and fungi

Cell health can be monitored by numerous methods. Plasma membrane integrity, DNA synthesis, DNA content, enzyme activity, presence of ATP, and cellular reducing conditions are known indicators of cell viability and death. alamarBlue Cell Viability Reagent is an indigo-colored, non-toxic reagent that detects metabolically active cells and is used for the quantitative analysis of cell viability and proliferation. alamarBlue reagent has broad applicability and can be used with various human and animal cell lines, bacteria, plant, and fungi.

When added to cells, alamarBlue Cell Viability Reagent is modified by the reducing environment of viable cells and turns red in color and becomes highly fluorescent. This color change and increased fluorescence can be detected using absorbance (detected at 570 and 600 nm) or fluorescence (using an excitation between 530–560 and an emission at 590 nm). To assay for viability, simply add the pre-mixed alamarBlue reagent to cells in complete media (no wash or cell lysis steps required), incubate for one to four hours, and read using either an absorbance- or fluorescence-based plate reader. If necessary, longer incubation times may be used for greater sensitivity without compromising cell health.

The homogeneous, add-and-read assay format of the alamarBlue Cell Viability Reagent is fast, convenient, and readily amenable to automation and high-throughput assays. The color change and fluorescence increase resulting from cell viability changes allow the detection of alamarBlue reagent by either an absorbance- or fluorescence-based instrumentation.

Results per page
    spinner