Pierce™ Detergent Compatible Bradford Assay Kit
Pierce™ Detergent Compatible Bradford Assay Kit
Thermo Scientific™

Pierce™ Detergent Compatible Bradford Assay Kit

The Pierce Detergent Compatible Bradford Assay Kit is a quick and ready-to-use modification of the well-known Bradford Coomassie dye-binding, colorimetricRead more
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Catalog number 23246
Price (USD)
226.00
Each
Add to cart
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Price (USD)
226.00
Each
Add to cart
The Pierce Detergent Compatible Bradford Assay Kit is a quick and ready-to-use modification of the well-known Bradford Coomassie dye-binding, colorimetric method for total protein quantitation. Unique additives to the Bradford Reagent make it compatible with up to 1% or higher of detergents and lysis reagents that are commonly used in life science research, including Triton X-100 and NP-40.

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Flexible—compatible with samples both with and without detergent
Sample volume—requires only 10 μL for microplate procedure
Colorimetric—measure with a standard spectrophotometer or plate reader at 595 nm
Ready-to-use—single reagent; no working reagent preparation required
Assay time—10-min incubation at room temperature
Assay range—detects protein concentration in the range of 2 to 1500 μg/mL

Similar to the Bradford method, Coomassie dye binds protein in an acidic medium causing an immediate shift in absorption maximum from 465 nm to 595 nm with a concomitant color change from green to blue. In addition, the assay is complete in just 10 minutes.

The protein assay can be performed in either test tube or microplate format. The standard working range is 100–1500 μg/mL with up to 1% detergent (or higher in some cases). Protein concentrations are estimated by reference to absorbances obtained for a series of standard protein dilutions, typically bovine serum albumin (BSA), which are assayed alongside the unknown samples. Because the color response with Coomassie dye is non-linear with increasing protein concentration, a standard curve must be completed with each assay. Standards can be used directly without preparing them in the same detergent found in the test samples.

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For Research Use Only. Not for use in diagnostic procedures.
Specifications
AssayBradford Assay
Detection MethodColorimetric
Product LinePierce™
Product TypeProtein Quantitation Assay
SpecificityNot Target-Specific
For Use With (Application)Solution-based Detection, Absorbance
For Use With (Equipment)Spectrophotometer, Microplate Reader
Quantity300 Test Tube Assays
Unit SizeEach
Contents & Storage
Detergent Compatible Bradford Assay Reagent, 450 mL, store at 4°C
Albumin Standard Ampules, 10 x 1 mL, store at room temperature

Frequently asked questions (FAQs)

What is the recommended shelf life of the Pierce Detergent Compatible Bradford Assay Kit (Cat. No. 23246)?

The Pierce Detergent Compatible Bradford Assay Kit (Cat. No. 23246) does not have a real expiry date. We rather established a functional warranty which means that we guarantee the functionality of the product for one year from date of shipment, if stored correctly. This is valid unless a different written warranty is included with the product literature. Please refer to the following Terms & Conditions of Sales document from our website: https://www.thermofisher.com/content/dam/LifeTech/Documents/PDFs/Life-Technologies-General-Terms-Conditions-Sale.pdf

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

Can you provide the shelf-life for the Pierce Detergent Compatible Bradford Assay Kit?

The Pierce Detergent Compatible Bradford Assay Kit is covered under our general 1-year warranty and is guaranteed to be fully functional for 12 months from the date of shipment, if stored as recommended. Please see section 8.1 of our Terms & Conditions of Sale (https://www.thermofisher.com/content/dam/LifeTech/Documents/PDFs/Terms-and-Conditions-of-Sale.pdf) for more details.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

I assayed two protein samples, each containing a different mixture of proteins of same concentration and observed very different color responses in the assay. What is the cause?

Each of the commonly used total protein assay methods exhibits some degree of varying response toward different proteins. These differences relate to amino acid sequence, pI, structure and the presence of certain side chains or prosthetic groups that can dramatically alter the protein’s color response. Most protein assay methods use BSA or immunoglobulin (IgG) as the standard against which the concentration of protein in the sample is determined. However, if great accuracy is required, prepare the standard curve from a pure sample of the target protein.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

My buffer or components of my buffer are not listed in the compatibility table for my protein assay. What should I do?

You can test the tolerance of the assay for your specific buffer formulation. For in-house generated compatibility information, substances were considered compatible at the indicated concentration in the Standard Test Tube Protocol (found in the manual for each protein assay) if the error in protein concentration estimation caused by the presence of the substance was less than or equal to 10%. The substances were tested using WR prepared immediately before each experiment. Blank-corrected 562nm absorbance measurements (for a 1000µg/mL BSA standard + substance) were compared to the net 562nm measurements of the same standard prepared in 0.9% saline.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

All the components of my sample buffer are at or below the indicated compatible concentration for my protein assay, but I am still seeing too much/too little color development. What could be the problem?

It is possible to have a substance additive affect such that even though a single component is present at a concentration below its listed compatibility, a sample buffer containing a combination of substances could interfere with the assay. You should take steps to eliminate or minimize the effects of the interfering substance(s) by diluting or removing the substance.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.