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Index / EpigenTek / MethylFlash Methylated DNA Quantification Kit Colorimetric / Product Detail : P-1034-48 MethylFlash Methylated DNA Quantification Kit Colorimetric
#P-1034-48 MethylFlash Methylated DNA Quantification Kit Colorimetric
Product name : MethylFlash Methylated DNA Quantification Kit Colorimetric
Catalog number : P-1034-48
Quantity: 48 assays
Supplier name : EpigenTek
Data sheet: Ask more or other datasheet now !
About this Product :MethylFlash Methylated DNA Quantification Kit Colorimetric antibody storage GENTAUR recommends for long therm storage to freeze at -24 C. For short time storage up to 30 days we suggest fridge storage at 1 to 10 C. Prevent multiple freeze taw cycles of MethylFlash Methylated DNA Quantification Kit Colorimetric .
More Details about
MethylFlash™ Methylated DNA
Quantification Kit (Colorimetric)
Catalog No. P-1034
* Spin the solution down to the bottom prior to use.
Note: The ME3 Negative Control is an unmethylated polynucleotide containing 50% of cytosine. The ME4 Positive Control is a methylated polynucleotide containing 50% of 5-methylcytosine.
Shipping and Storage
The kit is shipped in two parts: the first part at ambient room temperature and the second part on frozen ice packs at 4°C. Upon receipt: (1) Store ME3, ME4, ME6, and ME7 at –20°C away from light; (2) Store ME1, ME5, ME8, and 8-Well Assay Strips at 4°C away from light; (3) Store remaining components (ME2 and ME9) at room temperature away from light. All components of the kit are stable for 6 months from the date of shipment, when stored properly.
Note: Check ME1 (10X Wash Buffer) contains salt precipitates before use. If so, briefly warm at room temperature or 37°C and shake the buffer until the salts are re-dissolved.
Product Use Information
The MethylFlashTM Methylated DNA Quantification Kit (Colorimetric) is suitable for detecting global DNA methylation status using DNA isolated from any species such as mammalians, plants, fungi, bacteria, and viruses in a variety of forms including, but not limited to, cultured cells, fresh and frozen tissues, paraffin-embedded tissues, plasma/serum samples, and body fluid samples. Input DNA The amount of DNA for each assay can be 50 to 200 ng. For optimal quantification, the input DNA amount should be 100 ng, as methylated DNA varies from tissue to tissue and can be less than 1% of total DNA in some species.
Starting materials can include various tissue or cell samples such as cells from flask or microplate cultured cells, fresh and frozen tissues, paraffin-embedded tissues, plasma/serum samples, body fluid samples, etc.
Both negative and positive DNA controls are provided in this kit. A standard curve can be performed (range: 1 to 10 ng) or a single quantity of methylated DNA can be used as a positive control. Because global methylation can vary from tissue to tissue, and from normal and diseased states, it is advised to run replicate samples to ensure that the signal generated is validated. This kit will allow the user to quantify an absolute amount of methylated DNA and determine the relative methylation states of two different DNA samples.
To avoid cross-contamination, carefully pipette the sample or solution into the strip wells. Use aerosolbarrier pipette tips and always change pipette tips between liquid transfers. Wear gloves throughout the entire procedure. In case of contact between gloves and sample, change gloves immediately.
General Product Information
Each lot of the MethylFlashTM Methylated DNA Quantification Kit (Colorimetric) is tested against predetermined specifications to ensure consistent product quality. Epigentek guarantees the performance of all products in the manner described in our product instructions.
If this product does not meet your expectations, simply contact our technical support unit or your regional distributor. We also encourage you to contact us if you have any suggestions about product performance or new applications and techniques. Safety Suitable lab coat, disposable gloves, and proper eye protection are required when working with this product.
Epigentek reserves the right to change or modify any product to enhance its performance and design. The\ information in this User Guide is subject to change at any time without notice. Thus, only use the User Guide that was supplied with the kit when using that kit.
The MethylFlash™ Methylated DNA Quantification Kit (Colorimetric) is for research use only and is not intended for diagnostic or therapeutic applications.
The MethylFlash™ Methylated DNA Quantification Kit (Colorimetric) and methods of use are covered by pending US patents.
A Brief Overview
DNA methylation occurs by the covalent addition of a methyl group at the 5-carbon of the cytosine ring by DNA methyltransferases, resulting in 5- methylcytosine (5-mC). In somatic cells, 5-mC is found almost exclusively in the context of paired symmetrical methylation of the dinucleotide CpG, whereas in embryonic stem (ES) cells, a substantial amount of 5-mC is also observed in non-CpG contexts. The biological importance of 5-mC as a major epigenetic modification in phenotype and gene expression has been recognized widely. For example, global decrease in 5-mC content (DNA hypomethylation) is likely caused by methyl-deficiency due to a variety of environmental influences, and has been proposed as a molecular marker in multiple biological processes such as cancer. It has been well demonstrated that the decrease in global DNA methylation is one of the most important characteristics of cancer. Thus, the quantification of 5-mC content or global methylation in cancer cells could provide very useful information for detection and analysis of this disease. Quite recently, a novel modified nucleotide, 5-hydroxymethylcytosine (5- hmC) has been detected to be abundant in mouse brain and embryonic stem cells. In mammals, it can be generated by oxidation of 5- methylcytosine, a reaction mediated by the Tet family of enzymes and Dnmt proteins. It is a hydroxylated and methylated form of cytosine.
The broader functions of 5-hmC in epigenetics are still a mystery today. However, a line of evidence does show that 5-hmC plays a role in DNA methylation structures and patterns. Because of the presence of both 5-mC and 5-hmC in DNA with possibly different functions, it is important to determine the contents of these two modified nucleotides and their ratios in different cell types and in different compartments of the genome of mammalians. It is particularly important to identify that in healthy and diseased human cell/tissues, the epigenetic change at the DNA level is due to methylation or hydroxymethylation. Several chromatography-based techniques such as HPLC, TLC mass spectrometry are used for detecting 5-mC and 5-hmC. However, these methods are time consuming and have low throughput with high costs. To address this problem, Epigentek offers the MethylFlash™ Methylated DNA Quantification Kit (Colorimetric) to quantify 5-mC or methylated DNA. This kit is optimized for paired use with our MethylFlash™ Hydroxymethylated DNA Quantification Kit for simultaneously quantifying both methylated and hydroxymethylated DNA, or for quantifying methylated DNA by itself. The kit has the following advantages and features:
• Colorimetric assay with easy-to-follow steps for convenience and speed. The entire procedure can be finished within 4 hours.
• Innovative kit composition enables background signals to be extremely low, which eliminates the need for plate blocking and allows the assay to be simple, accurate, reliable, and consistent.
• High sensitivity, of which the detection limit can be as low as 0.2 ng of methylated DNA (methylation).
• Optimized antibody and enhancer solutions allow high specificity to 5-mC, with no cross-reactivity to unmethylated cytosine and no or negligible cross-reactivity to hydroxymethylcytosine within the indicated concentration range of the sample DNA.
• Universal positive and negative controls are included, which are suitable for quantifying methylated DNA from any species.
• Strip-well microplate format makes the assay flexible: manual or high throughput analysis.
1. Robertson, K. D. Nat Rev Genet. 6: 597-610, 2005.
2. Kriaucionis, S. et al: Science. 324: 929-930, 2009.
3. Wyatt, G.R. et al: Biochem J. 55: 774-8, 1953.
4. Tahiliani, M. et al: Science. 324: 930-935, 2009.
5. Valinluck, V. et al: Nucleic Acids Res. 32: 4100-4108, 2004.
6. Valinluck, V. et al: Cancer Res. 67: 946-50, 2007.
7. Jin, S. G. et al: Nucleic Acids Res. 38: e125, 2010.
Principle and Procedure
The MethylFlashTM Methylated DNA Quantification Kit (Colorimetric) contains all reagents necessary for the quantification of global DNA methylation. In this assay, DNA is bound to strip wells that are specifically treated to have a high DNA affinity. The methylated fraction of DNA is detected using capture and detection antibodies and then quantified colorimetrically by reading the absorbance in a microplate spectrophotometer. The amount of methylated DNA is proportional to the OD intensity measured.
Materials Required But Not Supplied
_ Adjustable pipette
_ Aerosol resistant pipette tips
_ Microplate reader capable of reading absorbance at 450 nm
_ 1.5 ml microcentrifuge tubes
_ Incubator for 37°C incubation
_ Plate seal or Parafilm M
_ Distilled water
_ 1X TE buffer pH 7.5 to 8.0
_ Isolated DNA of interest
For the best results, please read the protocol in its entirety prior to starting your experiment.
Input DNA Amount: DNA amount can range from 50 ng to 200 ng per reaction. An optimal amount is 100 ng per reaction. Starting DNA may be in water or in a buffer such as TE. DNA Isolation: You can use your method of choice for DNA isolation. Epigentek offers a series of genomic DNA isolation kits for your convenience (see page 18 under “Ordering Information”). DNA Storage: Isolated genomic DNA can be stored at 4°C (short term) or –20°C (long term) until use.
1. Preparation of 1X Wash Buffer (ME1)
48 Assays Kit: Add 13 ml of ME1 10X Wash Buffer to 117 ml of distilled water (pH 7.2-7.5).
96 Assays Kit: Add 26 ml of ME1 10X Wash Buffer to 234 ml of distilled water (pH 7.2-7.5).
This Diluted ME1 1X Wash Buffer can now be stored at 4°C for up to six months.
2. Preparation of Diluted Positive Control (ME4) Single Point Control Preparation: Dilute ME4 Positive Control with 1X TE to 5 ng/5l (1 5l of ME4 + 3 5l of TE). Suggested Standard Curve Preparation: First, dilute ME4 to 10 ng/5l (5 5l of ME4 + 5 5l of 1X TE). Then, further prepare five different concentrations with the 10 ng/5l diluted ME4 and 1X TE into 0.5, 1, 2, 5, and 10 ng/5l according to the following dilution chart:
3. DNA Binding
a. Predetermine the number of strip wells required for your experiment. Carefully remove un-needed strip wells from the plate frame and place them back in the bag (seal the bag tightly and store at 4°C).
b. Add 80 5l of ME2 Binding Solution to each well.
c. Add 1 5l of ME3, 1 5l of Diluted ME4 (see note below), and 100 ng of your Sample DNA (1-8 5l) into the designated wells depicted in Table 1 or Table 2 on Page 15. Mix solution by gently tilting from side to side or shaking the plate several times. Ensure the solution coats the bottom of the well evenly.
Note: (1) For a single point control, add 1 9l of ME4 at a concentration of 5 ng/9l, as prepared in Step 2; For the standard curve, add 1 9l of Diluted ME4 at concentrations of 0.5 to 10 ng/9l (see the chart in Step 2). The final amounts should be 0.5, 1, 2, 5, and 10 ng per well. (2) For optimal binding, sample DNA volume added should not exceed 8 9l.
d. Cover strip plate with plate seal or Parafilm M and incubate at 37°C for 90 min.
e. Remove the ME2 Binding Solution from each well. Wash each well with 150 5l of the Diluted ME1 1X Wash Buffer each time for three times.
4. Methylated DNA Capture
a. Dilute ME5 (at 1:1000 ratio) with the Diluted ME1.
b. Add 50 5l of the Diluted ME5 to each well, then cover and incubate at room temperature for 60 min.
c. Remove the Diluted ME5 solution from each well.
d. Wash each well with 150 5l of the Diluted ME1 each time for three times.
e. Dilute ME6 (at 1:2000 ratio) with the Diluted ME1.
f. Add 50 5l of the Diluted ME6 to each well, then cover and incubate at room temperature for 30 min.
g. Remove the Diluted ME6 solution from each well.
h. Wash each well with 150 5l of the Diluted ME1 each time for four times.
i. Dilute ME7 (at 1:5000 ratio) with the Diluted ME1.
j. Add 50 5l of the Diluted ME7 to each well, then cover and incubate at room temperature for 30 min.
k. Remove the Diluted ME7 solution from each well.
l. Wash each well with 150 5l of the Diluted ME1 each time for five times.
5. Signal Detection
a. Add 100 5l of ME8 to each well and incubate at room temperature for 1 to 10 min away from light. Begin monitoring color change in the sample wells and control wells. The ME8 solution will turn blue in the presence of sufficient methylated DNA.
b. Add 50 5l of ME9 to each well to stop enzyme reaction when color in the positive control wells turns medium blue. The color will change to yellow after adding ME9 and the absorbance should be read on a microplate reader at 450 nm within 2 to 15 min.
Note: If the strip-well plate frame does not fit in the microplate reader, transfer the solution to a standard 96-well microplate.
6. 5-mC Calculation
Relative Quantification: To determine the relative methylation status of two different DNA samples, simple calculation of percentage of 5-mC in total DNA can be carried out using the following formula:
Absolute Quantification: To quantify the absolute amount of methylated DNA using an accurate calculation, first generate a standard curve and plot the OD values versus the amount of ME4 at each concentration point. Next, determine the slope (OD/ng) of the standard curve using linear regression (Microsoft Excel’s linear regression functions are suitable for such calculation) and the most linear part (include at least 4 concentration points) of the standard curve for optimal slope calculation. Now calculate the amount and percentage of methylated DNA (5-mC) in total DNA using the following formulas:
Suggested Strip Well Setup
Table 1. Single Point Positive Control. The suggested strip-well plate setup using a single point positive control in a 48-assay format (for a 96- assay format, Strips 7 to 12 can be configured as Sample). The controls and samples can be measured in duplicate.
Table 2. Standard Curve Preparation. The suggested strip-well plate setup for standard curve preparation in a 48-assay format (for a 96-assay format, Strips 7 to 12 can be configured as Sample). The controls and samples can be measured in duplicate.
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 Ethnic differences in DNA methyltransferases expression in patients with systemic lupus erythematosus.
 Genetic variation in DNMT3B and increased global DNA methylation is associated with suicide attempts in psychiatric patients.
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