DsRed Fluorescence Standard Kit

IGĀ® DsRed Fluorescence Standard Kit contains purified recombinant DsRed protein for reliable quantification of DsRed and related red fluorescent protein signals. It enables standard curve generation, instrument calibration, and consistent fluorescence measurements across assays. The thermostable standard is compatible with microplate readers, spectrofluorometers, confocal microscopes, and other fluorescence-detection systems.

Custom formats, package sizes and bulk pricing are available upon request.

$485.00

DsRed Fluorescence Standard Kit

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IGĀ® DsRed Fluorescence Standard Kit contains purified recombinant DsRed protein for the quantitative measurement of DsRed and related red fluorescent protein signals in biological samples. DsRed is a red fluorescent protein commonly used in living-cell applications because of its strong and readily detectable fluorescence.

Using the procedure provided with the kit, the amount of DsRed in a sample can be determined by comparing its fluorescence intensity with a standard curve generated from known concentrations of recombinant DsRed. The standard is suitable for use with fluorescence microplate readers, spectrofluorometers, confocal microscopes, and other compatible fluorescence-detection systems.

The IGĀ® DsRed Fluorescence Standard provides a detection sensitivity of approximately 500 ng/mL when used with a standard fluorescence microplate reader. Greater sensitivity may be achieved with spectrofluorometers, confocal microscopes, or other high-sensitivity detection instruments. The excellent thermal stability of DsRed also makes the standard suitable for a broad range of fluorescence assays, instrument verification, assay development, and quality-control applications.

Applications:

  • Standardization of fluorescence from DsRed-transfected cells using FastAmpĀ® Plant Cell Lysis Solution
  • Calibration of spectrofluorometers and other fluorescence instruments forĀ in vitroĀ DsRed quantification
  • Generation of DsRed standard curves
  • Use as a positive control in fluorescence assays

Benefits:

  • Enables reliable quantification of DsRed fluorescence
  • Improves consistency and reproducibility across assays
  • Supports instrument calibration and standard curve generation
  • Compatible with spectrofluorometers and other fluorescence instruments
  • Thermostable and convenient for routine use

Product Source:
Recombinant DsRed expressed from a plasmid carrying the thermostable RFP gene.

Shipping Conditions:
Ship with ice packsĀ 

Specifications:

  • Purified recombinant DsRed protein
  • Molecular weight: approximately 31 kDa per monomer
  • Free of detectable endonuclease activity

Components and Storage Temperature:
The following reagents are supplied with this product:

Quality Control:
Protein Concentration:Ā  The stock protein concentration is determined by UV absorbance and confirmed by running against a standard using PAGE densitometry.
Fluorescence Quantum Yield: Protein dilutions and fluorescence measured 515 nm excitation and 530 nm emission match a DsRed batch control standard.

References:

  1. Baird, G. S., Zacharias, D. A. & Tsien, R. Y. Biochemistry, mutagenesis, and oligomerization of DsRed, a red fluorescent protein from coral. Proceedings of the National Academy of Sciences 97, 11984ā€“11989 (2000).
  2. Sacchetti, A., Subramaniam, V., Jovin, T. M. & Alberti, S. Oligomerization of DsRed is required for the generation of a functional red fluorescent chromophore. FEBS Letters 525, 13ā€“19 (2002).

Preparation for DsRed Standard Curve:

This protocol is for a plate reader but volumes may be adjusted for cuvettes or specimen wells under a microscope.

NOTE: A user may their own sample buffer as needed. The series below uses the kitā€™s assay buffer.

  1. Prepare a 1 to 100 dilution of DsRed into Fluorescence Assay Buffer to make a 10 Āµg/mL working stock solution
  2. Set up a dilution series into vials using the table below as a reference.
  3. Briefly mix the standards and measure the fluorescence amplitude of each sample. Set the excitation to 550 nm and the emission to 583 nm for DsRed standard curve measurements.

Tissue Preparation with FastAmpĀ® Plant Cell Lysis Solution (Optional):

  1. Add 500 ĀµL of 1X FastAmpĀ® Plant Cell Lysis Solution to 50 mg of tissue in a 1.5 mL microcentrifuge tube. Prepare a blank control containing lysis solution without tissue.
  2. Manually grind tissue with a micro-pestle for 30 seconds.
  3. Centrifuge the samples in a benchtop centrifuge at maximum speed for 5 minutes.
  4. Carefully transfer tissue extract supernatant to fresh 1.5 mL conical tubes
  5. Transfer 100 ĀµL for fluorescence intensity measurements using the same instrument settings used for the standard curve.
  6. Compare the fluorescence of the sample blank with that of the standard-curve blank for background fluorescence.

Plot DsRed Standard Curve:

  1. Plot fluorescence intensity (RFU) as a function of the Assayā€™s DsRed Concentration provided in the table above. It is appropriate to subtract the background buffer from all standards and samples.
  2. Fit the data points using linear regression, i.e. a line, to connect all data points. A good fitted curve will intersect all DsRed standard data points. The equation will have the form below:

    RFU = slope x [DsRed] + (y-intercept)

  3. Use the equation of the line to interpolate the sampleā€™s concentration of DsRed:
    [DsRed]sample = (RFU ā€“ y-intercept)/slope

DsRed Fluorescence Standard Kit Manual
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DsRed Fluorescence Standard Kit MSDS
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Certificate of Origin – DsRed Fluorescence Standard Kit
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