BioReagent,for protein analysis,ready-to-use BioReagent,for Protein analysis,Ready-to-use for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Store at 2-8°C,Protected from light Ships Wet ice Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
The Bradford Protein Assay Kit is a ready-to-use, stable traditional Bradford assay formulation for determining total protein concentration relative to a protein standard. The kit includes Bradford protein concentration determination reagent and ready-to-use diluted BSA standard solution, which was originally described by Bradford in 1976. When mixed with protein solutions, the color of the acidic Coomassie dye reagent changes from brown to blue in a manner proportional to the amount of protein present in the sample. Protein determination is performed by comparing the color response with that of a protein detection standard prepared as a known dilution series, typically as bovine serum albumin (BSA) or bovine gamma globulin (BGG). The simple procedure is suitable for almost any volume scale, including test tubes, cuvettes, and microplates. The protein detection is compatible with most salts, solvents, buffers, thiols, reducing substances, and metal chelators encountered in protein samples.
Product Features
1. The detection speed is extremely fast, with 10 to 80 samples completed in less than 10 minutes.
2. Convenient and efficient, it provides ready-to-use standards, eliminating the need for cumbersome dilution procedures.
3. It has high sensitivity, with a detection concentration lower limit of 25 μg/mL.
4. It has a good linear relationship within the concentration range of 50-2000 μg/mL.
5. The Bradford method for protein concentration determination is not affected by most of the chemical substances in the samples. It has the advantages of compatibility with high concentration reducing agents, and can also tolerate higher concentrations of detergents. It can well tolerate detergents such as 1% Triton X-100, 1% NP-40, and 1% Brij35.
6. Applicable to spectrophotometers or microplate readers.
Figure 1. The actual measurement result of the protein standard curve of this kit. The data shown in the figure are for reference only; the actual detection outcome may vary slightly.
Instruction for use
A. Microplate quantification assay (detection range = 50-2000 μg/mL)
1. Take 5 μL of the BSA standard and unknown samples respectively to the corresponding labeled microplate wells.
2. Add 250 μL of the bradford assay solution to each well, mix well and shake thoroughly for 30 seconds.
3. Stop shaking. For most cases, incubate the samples at room temperature for 10 minutes.
4. Measure the absorbance at 595 nm in the reading instrument. The absorbance can be measured immediately, or within 2 hours. There is no significant change in the detection data within 2 hours.
5. Draw a standard curve and calculate the protein concentration in the sample.
B. Micro-microplate quantification assay (detection range = 1-25 μg/mL)
1. Take 150 μL of the BSA standard and unknown samples respectively to the corresponding labeled microplate wells.
2. Add 150 μL of bradford assay solution to each well, mix well and shake thoroughly for 30 seconds.
3. Stop shaking. For most cases, incubate the sample at room temperature for 10 minutes.
4. Measure the absorbance value at 595 nm in the reading instrument. The absorbance can be determined immediately or within 2 hours. There is no significant change in the detection data within 2 hours.
5. Draw a standard curve and calculate the protein concentration in the sample. If the protein concentration is not within the range of the standard curve, please dilute the sample and measure it again.
Matters needing attention
1. Reverting the G250 staining solution to room temperature before use is beneficial for enhancing the sensitivity of the detection. Before using the G250 staining solution, please invert it 3-5 times and mix well.
2. Some cations, such as K⁺, Na⁺, Mg²⁺, (NH₄)₂SO₄, ethanol and other substances, do not interfere with the measurement and can also be well compatible with most detergents such as 1% Triton X-100, 1% NP-40, and 1% Brij35.
3. It is recommended that a standard curve be plotted each time the concentration of the protein sample is determined, in order to obtain accurate data.
4. For your safety and health, please wear laboratory coats and use disposable gloves during the operation.
Interferon Substance Table
B1509656 | Components | 1000T | storage temperature | Quantity Per Test |
B1509656A | Bradford Assay Solution | 250 mL | 2-8°C, Store in the dark. | 250 μL |
B1509656B | BSA Standard (2 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656C | BSA Standard (1.5 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656D | BSA Standard (1.0 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656E | BSA Standard (0.75 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656F | BSA Standard (0.5 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656G | BSA Standard (0.25 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656H | BSA Standard (0.125 mg/mL) | 1 mL | 2-8°C | 5μL |
B1509656I | BSA Standard (0 mg/mL) | 1 mL | 2-8°C | 5μL |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
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View spec sheet →Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Fecha | Articulo |
|---|---|---|---|
 ZJ26F0434208 | Certificate of Analysis | Apr 20, 2026 | B1509656 |
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