Sort By

SYTO™ 11 Green Fluorescent Nucleic Acid Stain - 5 mM Solution in DMSO (Invitrogen™)

The cell-permeant SYTO 11 green fluorescent nucleic acid stain exhibits bright, green fluorescence upon binding to nucleic acids. Because the staining pattern of the SYTO dyes in live cells may vary between cell types, we offer the SYTO Green Fluorescent Nucleic Acid Stain Sampler Kit #1 (S-7572) to enable researchers to find the most appropriate green-fluorescent SYTO stain for their system.

SYTO™ 62 Red Fluorescent Nucleic Acid Stain - 5 mM Solution in DMSO (Invitrogen™)

The cell-permeant SYTO 62 red fluorescent nucleic acid stain exhibits bright, red fluorescence upon binding to nucleic acids. Because the staining pattern of the SYTO dyes in live cells may vary between cell types, we offer the SYTO Red Fluorescent Nucleic Acid Stain Sampler Kit (S-11340) to enable researchers to find the most appropriate red-fluorescent SYTO stain for their system.

NucRed™ Live 647 ReadyProbes™ Reagent (Invitrogen™)

NucRed Live 647 ReadyProbes Reagent is a bright, far-red, cell-permeant nuclear stain for live or fixed cells. It is provided as a room temperature-stable solution in a convenient-to-use dropper bottle. Just add two drops per ml to stain your cells.

• No need to dilute, weigh, or pipette
• Convenient dropper bottle—just use two drops per mL
• Stable at room temperature—keep handy at your scope or cell culture area
• Excited at 638 nm when bound to DNA, with an emission maximum at 686 nm

See other ReadyProbes reagents for cell staining
See other nuclear stains for imaging

Cell imaging applications
The far-red fluorescence emission makes it ideal for use in combination with blue, green, and red fluorophores, such as Hoechst, GFP/FITC, and Texas Red.

Suggestions for use
• NucRed Live 647 ReadyProbes Reagent may be added directly to cells in full media, or buffer solutions.
• In most cases, 2 drops/mL and an incubation of 15 to 30 minutes will give bright nuclear staining; however, more or fewer drops can be added for optimal staining intensity.
• In most cases, staining intensity increases with time if cells are not washed prior to imaging.
• It is detected through a far-red filter, such as a Cy5 filter, or a Cy5 Light Cube for EVOS imaging systems.

NucRed™ Dead 647 ReadyProbes™ Reagent (Invitrogen™)

NucRed Dead 647 ReadyProbes Reagent is a cell impermeant stain that emits bright far-red fluorescence when bound to DNA. Since this reagent stains the cells without plasma membrane integrity it is extremely useful to measure viability and to measure cytotoxicity in kinetic live cell assays. NucRed Dead 647 reagent is also suitable for staining nuclei in fixed cell preparations and tissue sections.

• Exceptionally bright far-red fluorescence upon binding to DNA
• Rapid staining of damaged, dead, or fixed cells without wash steps
• Ready-to-use liquid formulation in convenient dropper bottle
• Stability at room temperature—keep handy at your scope or cell culture area

See other ReadyProbes reagents for cell staining
See other nuclear stains for imaging

Cell imaging applications
The far-red fluorescence emission makes it ideal for use in combination with blue, green, and red fluorophores, such as Hoechst, GFP/FITC, and Texas Red.

Suggestions for use
• NucRed Dead 647 ReadyProbes Reagent may be added directly to cells in full media, or buffer solutions.
• In most cases, 2 drops/mL and an incubation of 15 to 30 minutes will give bright nuclear staining; however, more or fewer drops can be added for optimal staining intensity.
• In most cases, staining intensity increases with time if cells are not washed prior to imaging.
• It is detected through a far-red filter, such as a Cy5 filter, or a Cy5 Light Cube for EVOS imaging systems.

NucGreen™ Dead 488 ReadyProbes™ Reagent (Invitrogen™)

NucGreen Dead 488 ReadyProbes Reagent is a room temperature-stable solution of SYTOX Green Nucleic Acid Stain (Cat. No. S7020), which is a cell-impermeant stain that emits exceptionally bright, green fluorescence when bound to DNA. Cells that have lost plasma membrane integrity are stained within minutes, making this an extremely useful stain to estimate live/dead cell ratios and to measure cytotoxicity in kinetic live-cell assays. It is also suitable for staining nuclei in fixed cell preparations and tissue sections.

• Exceptionally bright green fluorescence upon binding to DNA
• Rapid staining of damaged, dead, or fixed cells without wash steps
• Ready-to-use liquid formulation in convenient dropper bottle—no need to dilute, weigh, or pipette
• Stability at room temperature—keep handy at your scope or cell

See other ReadyProbes reagents for cell staining
See other nuclear stains for imaging

Cell imaging applications
The membrane-impermeable NucGreen Dead 488 reagent is a high-affinity DNA stain that easily stains cells with compromised cell membranes, yet does not enter living cells. It is therefore ideal for discrimination of live and dead cells. The fluorescence increases more than 500-fold on binding to dsDNA in cells with compromised cell membranes (dying or dead cells), in fixed cells, and tissue slices. The spectral properties, with excitation/emission at 504/523 nm when bound to DNA, are ideal for standard FITC filters. .

Suggestions for use
• NucGreen Dead 488 reagent may be added directly to cells in full media or buffer solutions
• It easily stains nuclei of fixed cells and tissue slices
• In most cases, 2 drops/ml and an incubation time of 15 to 30 minutes will give bright nuclear staining; however, optimization may be needed for some cell types, conditions, and applications. In such cases, simply add more or fewer drops until the optimal staining intensity is obtained. In most cases, staining intensity increases with time if cells are not washed prior to imaging.
• NucGreen Dead 488 dye is excited with a maximum at 504 nm when bound to DNA, with an emission maximum at 523 nm. It is detected through standard GFP and FITC filters.

CyQUANT™ Direct Cell Proliferation Assay (Invitrogen™)

Experience a more convenient workflow for your high-throughput cytotoxicity and proliferation screening projects with the CyQUANT® Direct Cell Proliferation Assay–no washes, cell lysis, temperature equilibrations, or radioactivity required. DNA-based assays have been shown to be among the most sensitive cell health indicators and data concordance with metabolically based assays is excellent. The CyQUANT® Direct assay is a highly sensitive and robust method to assess cell growth, viability, or compound toxicity in a range of applications, from high throughput screening to bioproduction.

Features of the CyQUANT® Direct Cell Proliferation Assay include:

• More convenient workflow for high-throughput screening–no washes, cell lysis, temperature equilibrations, or radioactivity required
• Rapid protocol, high sensitivity and dynamic range
• Measures independent of metabolic state of cells on standard fluorescent plate readers
• Multiplex assays using a spectrally distinct fluorescent or a luminescent readout

Rapid and convenient, with a large dynamic range
The CyQUANT® Direct assay is a fluorescence-based proliferation and cytotoxicity assay for microplate readers with a linear detection range from less than 100 to 20,000 cells per well in most cell types. The no-wash, homogenous format and fast add-mix-read protocol makes the CyQUANT® Direct assay ideal for HTS applications. The assay can be completed in one hour, with no washes, no cell lysis, or temperature equilibrations required. The signal is stable for several hours, affording additional work flow convenience.

How it works
The CyQUANT® Direct assay is based on a cell-permeant DNA-binding dye in combination with a masking dye reagent. Cellular DNA is highly regulated and estimates of cell numbers based on DNA are very accurate. The masking dye blocks staining of dead cells or cells with compromised cell membranes resulting in only healthy cells being stained. The CyQUANT® Direct assay, therefore, measures proliferation as well as membrane integrity, another measure of cell health. Users of metabolically based cell health assays can readily compare historical data with results from the CyQUANT® Direct assay, as concordance assays based on metabolism or energy (ATP) has been shown to be excellent. Furthermore, it is possible to multiplex with spectrally distinct fluorescent probes or luminescence assay kits because cells are not lysed. Furthermore, the fluorescent signal allows the user to switch between HTS and HCS plate readers if multiplex assays require different platforms.

mRNA Catcher™ PLUS Purification Kit (Invitrogen™)

The mRNA Catcher™ PLUS Kit enables high-throughput purification of mRNA from cells, tissues, blood, and total RNA in a 96-well format. By taking advantage of Locked Nucleic Acid (LNA) technology, the mRNA Catcher™ PLUS Kit provides improved performance and a faster protocol, while preserving mRNA yield and purity (see table). The mRNA Catcher™ PLUS Kit offers:

Robust performance—high binding capacity per well (>80 ng/well)
Reproducible results—low CVs from well-to-well and plate-to-plate (~2%)
Optimized protocols—for small sample sizes (100 cells, 4 mg tissue, and 40 µL blood)
Compatible plate design—may be used with most PCR cyclers

How it works
mRNA from total RNA, cells, tissue, and blood samples is hybridized to an immobilized, single-stranded 20-mer oligo(dT)-containing LNA. The incorporation of LNA into the oligo probe increases the hybridization efficiency and specificity of the mRNA binding. The mRNA can either be eluted or directly reversed-transcribed to cDNA directly in the well. The mRNA Catcher™ PLUS method does not require centrifugation, precipitation, phase separation, or column filtration. In addition, the entire method is amenable to automation for streamlined, high-throughput expression profiling for large-scale processes. Isolated mRNA is suitable for use in downstream applications such as RT-PCR and qRT-PCR.

PrepFiler™ Forensic DNA Extraction Kit, updated (Applied Biosystems™)

The PrepFiler Forensic DNA Extraction Kit uses magnetic particles with an optimized multi-component surface chemistry to deliver superior DNA yield from most forensic sample types, including body fluids, and stains and swabs of body fluids. Whether it’s an automated or manual application, this kit is designed to help improve the overall yield and concentration of DNA recovered from both routine and challenging samples, while enabling removal of PCR inhibitors. This means greater quantities of highly purified DNA for improved downstream genotyping results. This kit is intended for manual use with 1.5 mL tubes. For automated workflows, please see the PrepFiler Automated Forensic DNA Extraction Kit.

• Designed to improve the overall yield, concentration, and purity of DNA isolated from both routine and challenging forensic samples
• Contains specially developed magnetic particles and reagents that optimize DNA binding and elution of DNA in a small volume
• Offers streamlined protocols to process an extensive variety of forensic samples
• Part of an integrated solution including novel reagents, consumables, and automated options to provide reliable, simplified, and time-saving DNA purification
• Improves downstream genotyping (STR analysis) success rate, to help ensure that critical and often limited casework samples can be successfully analyzed

Improved Packaging and Configuration
Several packaging and configuration improvements have been implemented for the updated PrepFiler kits:
• An additional wash buffer, PrepFiler Wash Buffer B, has now been incorporated into the kits to minimize the potential for detergent carryover from PrepFiler Wash Buffer A, which can inhibit downstream PCR applications when the maximum volume of DNA extract is used for subsequent PCR amplification.
• The kit packaging has been updated to include all reagents, including magnetic particles, in the same kit box, with a single expiration date.
• Shipping will occur at ambient temperature, and the kits can also be stored upon receipt at ambient temperature.
• In this kit configuration, plastic consumables are not included (PrepFiler Filter Columns for substrate removal and PrepFiler Spin Tubes for sample processing in tube format). For the kit with plastics, see Cat. No. 4463350.

iPrep™ Trizol™ Plus RNA Kit (Invitrogen™)

Use the iPrep™ Trizol® Plus RNA Kit for the highest purity, even from difficult samples such as fatty tissue. This kit provides reproducible RNA sample preparation from up to 50 mg of tissue, 10e7 cultured cells, 10 ml blood, and plant samples. The kit contains pre-filled, fully qualified cartridges to avoid any mix-ups or cross-contamination. It also provides low CVs and reduced purification variability, increasing the reliability of your gene expression assays.

FluoReporter™ Blue Fluorometric dsDNA Quantitation Kit, 200-2,000 assays (Invitrogen™)

The FluoReporter® Blue Fluorometric dsDNA Quantitation Kit provides the protocols and reagents for analyzing cellular NA with the blue-fluorescent Hoechst 33258 nucleic acid stain. With this kit, quantitation of cellular DNA is rapid, and all manipulations can be carried out in microplate wells. The cells are lysed by freezing them in distilled water, the diluted dye solution is then added to the lysed cells, and fluorescence is measured.

iPrep™ PureLink™ Total RNA Kit (Invitrogen™)

Choose the iPrep™ PureLink® Total RNA Kit for high yields from even the smallest sample (10 mg of tissue, 10e6 cultured cells or 1 ml of blood). The kit contains pre-filled, fully qualified cartridges to avoid any mix-ups or cross-contamination. It also provides low CVs and reduced purification variability, increasing the reliability of your gene expression assays.

iPrep™ Card: Total RNA (Invitrogen™)

The iPrep™ Protocol Card is a flash, 512 KB memory card. Each iPrep™ Protocol card is pre-programmed with the purification protocol that directs the volume of reagents used and incubation time.