甲基化免疫沉淀试剂盒 货号：E-55009
MeDIP
背景资料：.
The MeDIP Kit is designed to immunoprecipitate and enrich for single-stranded DNA fragments containing 5-methylcytosine (5-mC). The MeDIP Kit contains a monoclonal 5-methylcytidine antibody, a bridging antibody and the necessary buffers to perform methylated DNA immunoprecipitation (MeDIP). The affinity of the antibody enables separation of 5-mC DNA from 5-hmC DNA using single-stranded input DNA. For complete details, click the 5-mC Info tab below.
Active Motif's fast, magnetic protocol has been streamlined to minimize the number of wash and incubation steps, saving you valuable time. The kit also includes MseI digested human genomic DNA and PCR primers that can be used to verify the efficiency of the enrichment. Additionally, the kit contains a bar magnet for easy separation and elution of the enriched methylated DNA. Click the Data tab below to see results from the kit; manuals can be downloaded under the Documents tab
产品描述：Methylated DNA Immunoprecipitation (MeDIP) is an immunocapture technique in which an antibody specific for methylated cytosines is used to immunoprecipitate methylated genomic DNA fragments. MeDIP uses single-stranded DNA that has been fragmented by sonication or enzymatic digestion. The addition of a monoclonal antibody specific for 5-methylcytosine in the presence of a bridging antibody enables capture of the DNA fragments containg 5-mC methylation. The use of Protein G magentic beads provides quick and efficient capture. Methylated fragments are then eluted from the magnetic beads providing DNA samples that are specifically enriched for 5-mC DNA methylation. This selectivity is important as most common approaches to analyze DNA methylation, such as enzymatic approaches and bisulfite conversion, are unable to distinguish between 5-mC and 5-hmC..
The affinity of the antibody used in the MeDIP kit enables detection of methylated cytosines regardless of their context. This means that the methylation does not need to occur in the context of a CpG dinucleotide, unlike methyl-binding protein (MBD) affinity enrichment methods which requires CpG methylation for proper detection
产品组成：The MeDIP Kit is able to selectively enrich for DNA fragments containing 5-methylcytosine DNA methylation from the rest of the genomic DNA population. The MeDIP Kit was tested using 500 ng of the included MseI digested human genomic DNA in the presence or absence of bridging antibody. Eluted DNA was purified with Active Motif's Chromatin IP DNA Purification Kit(Catalog No. 58002) and tested in real time PCR with the included ZC3H13 PCR primer set. Results shown in Figure 1 demonstrate the importance of using a bridging antibody within the assay. In Figure 2, enriched DNA was tested using either the included positive control ZC3H13 PCR primer mix or a negative control GAPDH PCR primer mix.
产品应用：Since MeDIP uses a 5-methylcytosine antibody that only binds methylated cytosines in the context of single-stranded DNA to enrich for methylated genomic DNA, the DNA must be denatured prior to immunoprecipitation. As a result of denaturation, the enriched DNA can not be processed for Next-Gen sequencing using the typical sequencing library generation protocols, as these require adapter ligation to double-stranded DNA. This problem can be circumvented by addition of the Next-Gen adapters to fragmented genomic DNA prior to performing MeDIP.
保存建议：The MeDIP Kit contains a mouse monoclonal 5-methylcytidine antibody, a bridging antibody, negative control mouse IgG, PIC, Buffer C, Buffer D, Elution Buffer AM2, Neutralization Buffer, Sterile water, PCR tubes, Protein G magnetic beads and a bar magnet for the separation and elution of DNA fragments containing 5-mC. Protocols are provided for the fragmentation of sample DNA all the way through to real time PCR analysis of a locus of interest..
The kit also includes positive control DNA and PCR primers. Human genomic DNA, MseI digested and ZC3H13 PCR primer pair are provided for use as a positive control.
Storage condiitons range from room temperature to -20°C; please refer to the manual for proper storage temperatures of each component
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5-hmC 和 5-mC的区别
时下常用的DNA甲基化分析方法包括限制内切酶酶切和亚硫酸氢盐或MeDIP介导的MS-PCR和测序，这些技术都不适合用来检测5-hmC，因为它与5-mC事实上很难用这类方法区分开来。为了解决这个问题，EPIk研制了MethylFlash羟甲基化DNA定量试剂盒(荧光法)。本试剂盒提供了一种很经济的方法来检测5-羟甲基化胞嘧啶，并且区分5-hmC, 5-mC, 和 C，使得研究者能够重新评估他们的DNA甲基化信息，也能够在新样品中寻找DNA羟甲基化。 |
