KDalert™ GAPDH Assay Kit with Manual

Catalog number: AM1639M

Invitrogen™  Related applications: RNAi

Error loading your content!

  Catalog number
Select a plan
Unit size
Price ({{currency}}) Your price ({{currency}}) Availability Qty
{{product.sku}} {{product.sku}}
also known as {{product.formattedSku}} 
{{subscriptionDetails.selectedRatePlan.billingPeriod}} {{subscriptionDetails.selectedRatePlan.billingPeriod}} {{product.availability.message}}
Pro add-ons

Your on-site stock

›› {{supplyCenter.scName}}({{scProduct.stockOnHand}} In stock)
›› {{supplyCenter.scName}}(Out of stock)
›› {{supplyCenter.scName}}
This item is not currently available on-site. Depending on your Supply Center settings you may be able to add the item to cart above else use the Order Non-Stocked Items' tab on the Supply Center home page.
Back to top


The Ambion® KDalert™ GAPDH Assay Kit is for the reliable measure of GAPDH enzyme activity in cultured human, mouse, or rat cells in less than 30 minutes using a microplate fluorometer. The kit includes sufficient reagents for 375 reactions.

• Assess GAPDH siRNA delivery in 1/3 the time for 1/3 the cost of real-time PCR
• Analyze 1–96 samples simultaneously
• Measure both GAPDH siRNA-induced knockdown AND transfection-induced toxicity
• Compatible with a wide variety of cells and a broad range of culture conditions

The KDalert GAPDH Assay Kit is an ideal positive control for transfection optimization experiments and also measures transfection induced cytoxicity. It is designed for use with Ambion® Silencer® GAPDH siRNA.

Rapid, Time-Saving Procedure
Use the assay to optimize siRNA transfection by transfecting individual cell samples with a GAPDH siRNA and a negative control siRNA. Two to three days after transfection, simply add the included cell lysis buffer to the cells, incubate for 20 minutes, add the diluted master mix of assay reagents, and read the increase in fluorescence four minutes later using a microplate or standard fluorometer. The assay procedure can be completed in about 30 minutes with minimal sample handling.

One Assay for Two Readouts
Because GAPDH is expressed at relatively constant levels, the assay can also be used to monitor transfection agent induced toxicity. For this analysis, GAPDH enzyme activity from negative control siRNA-transfected cells is compared to that of untreated cells. Reduced GAPDH activity in negative control-transfected cells compared to non-transfected cells is an indication that the transfection-induced cytotoxicity.

Accessory Products:
The KDalert™ Kit is designed for use with Silencer® GAPDH siRNAs (SKUs #AM4605, AM4633, AM4634, AM4624, AM4632, or AM4631). Additional KDalert™ Lysis Buffer (SKU #AM8790G) is also available separately.
For Research Use Only. Not for use in diagnostic procedures.


Technique: Fluorescence Intensity, Absorbance
Assay Type: GAPDH Assay
Product Size: 375 reactions
Target Enzyme: GAPDH
Detection Method: Fluorescent
Substrate Properties: Chemical Substrate

Contents & storage

KDalert Lysis Buffer can be stored at –20°C or 4°C. Solution A, Solution B, and Solution C should be stored at –20°C. GAPDH Enzyme should be stored at or below –70°C.


Manuals & protocols