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22 protocols using magna chip g chromatin immunoprecipitation kit

1

Chromatin Immunoprecipitation Assay

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Cells were grown to 80% confluence and cells were then crosslinked with 1% formaldehyde and processed. The crosslinking, immunoprecipitation, washing, elution, reverse crosslinking, and proteinase K treatment were performed according to the manufacturer’s directions described in the Magna ChIP G Chromatin Immunoprecipitation Kit from Millipore. Purified immunoprecipitated DNA was used for quantitative RT-PCR.
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2

Chromatin Immunoprecipitation Assay for CREB

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The chromatin immunoprecipitation assay was performed by using the Magna ChIP G Chromatin Immunoprecipitation Kit (Millipore, USA) following the manufacturer's instructions. In brief, about 1 × 107 A549 cells were fixed in 1% formaldehyde and the cell lysates were sonicated into DNA fragments in the range of 200‐1000 bp. The antibody used in the ChIP assays was an anti‐CREB antibody (Abcam, UK), and an anti‐IgG control antibody (Millipore, USA) was used as a negative control. The purified DNA from input or immunoprecipitated samples were assayed by qPCR with SYBR Green SYBR Green I Master Mix (Takara, Japan) after reverse cross‐linking and DNA purification. The primers used were listed as follows: 5′‐GCTCCTACCTAATATCATCCCC‐3′ (sense); 5′‐AGTTATTTCCGGTAACAAGAGC‐3′ (antisense).
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3

Chromatin Immunoprecipitation Assay of TLR2 Promoter

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The chromatin immunoprecipitation assay was conducted by using a Magna ChIP G-chromatin immunoprecipitation kit (Millipore, catalogue number 17-611) as we described before (Feng et al., 2014 (link)). Briefly, the hippocampus tissue was cross-linked by 1.5% formaldehyde for 15 min at room temperature. The cross-linking was stopped by glycine and the tissue was washed twice with cold phosphate buffered saline. The cross-linked tissue was grinded, followed by processing with a 28-gauge needle to get homogeneous suspension. The homogenate was subsequently lysed by the cell lysis buffer and nucleus lysis buffer supplied in the kit. About 200 - 500 base pair cross-linked DNA fragments were obtained by sonication. The resulting DNA fragments were incubated with a rabbit polyclonal anti-HMGB1 antibody (Abcam, RRID: AB_444360) or normal rabbit IgG (Millipore, RRID: AB_490574) at 1 μg/450 μl sample overnight, respectively. The immunoprecipitated DNA was used to detect the quantity of a fragment of tlr2 promotor (−283 bp to −71 bp) by PCR assay. The primers were as follows: sense primer: 5’-CATAAGTAGGCAGTTTTGGTCAAGG-3’; anti-sense primer: 5’-GCAAGGATTCTGGAAGGAAGAGGAT-3’.
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4

Chromatin Immunoprecipitation Protocol for RelA

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Cells were grown to 80% confluence, and crosslinking was performed with 1% formaldehyde for 10 min. ChIP assays were performed using a Magna ChIP G Chromatin Immunoprecipitation Kit (Millipore) according to the manufacturer’s instructions. After immunoprecipitation with an antibody to RelA (Cell Signaling Technology, 8242) or normal rabbit IgG, protein-DNA crosslinks were reversed. DNA was then purified to remove the chromatin proteins and analysed by quantitative real-time PCR using the Qiagen EpiTect ChIP qPCR Primers (Cat# GPH1006956(-)01A).
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5

Chromatin Immunoprecipitation of Pokemon Transcription Factor

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Chromatin immunoprecipitation was performed as described (54 (link)) with the Magna ChIP G Chromatin Immunoprecipitation Kit (Millipore) using a hamster monoclonal antibody against Pokemon (LRF) (33 (link)). Primer sequences used for PCR were as follows: Dlk1_4,5_Fwd: cccagggacaggcagtaaggtt, Dlk1_4,5_Rev: ccaaacgcacaccacgaagat. 3T3L1 cells were crossed linked with formaldehyde for 5 minutes and terminated with 0.125M glycine. Cells were sonicated to generate chromatin with average size of 500bp. Monocloncal anti-LRF antibody were first incubated with a hamster bridging antibody (Jackson ImmunoResearch Laboratories), followed by addition of the 3T3L1 chromatin. Immunoprecipitated chromatin was assayed by quantitative PCR using the Dlk1-specific primers.
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6

ChIP-qPCR analysis of FZD7 regulation

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HMEC cells (Lonza) or MMTV-Wnt-1 primary cells were grown to 80% confluence and cells were then cross-linked with 1% formaledyde and processed. The crosslinking, immunoprecipitation, washing, elution, reverse crosslinking, and proteinase K treatment were performed according to the manufacturer’s directions described in the Magna ChIP G Chromatin Immunoprecipitation Kit from Millipore. Antibodies used were anti-4A4, H-129 (Santa Cruz) or normal rabbit IgG. Purified immunoprecipitated DNA was used for real time qPCR. Primers for ChIP PCR are: 5′-TATCAGCATTCCAGGCCCAC-3′ (forward) and 5′-TTCCTGGGAGAACAATCGCC-3′ (reverse) for human FZD7; 5′-AATGAGGCAAACACCCCCTC-3′ (forward) and 5′-CTCCGGGGGATTAAAGGTGG-3′ (reverse) for mouse Fzd7; 5′-CGAGATCCCTCCAAAATCAA (forward) and 5′-CCCAGCCTTCTCCATGG (reverse) for human GAPDH and 5′-AACATCAAATGGGGTGAGG-3′ (forward), 5′-GGCCTTCTCCATGGTGGT-3′ (reverse) for mouse Gapdh.
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7

ChIP-qPCR Analysis of CYR61 Regulation

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ChIP-qPCR was used to detect the histone modification and TF binding at the promoter and enhancer regions of CYR61. As we described before [29 (link)], the ChIP assay was performed using a Magna ChIP™ G Chromatin Immunoprecipitation Kit (Millipore, 17–611) according to the manufacturer’s protocol. ChIP-grade antibodies were as follows: 2 μg anti-RNA polymerase II (Millipore, 05–623), 2 μg anti-H3K27ac (ThermoFisher, 720,096), anti-H3K4me1 (Abcam, ab8895), 2 μg anti-H3K4me3 (Millipore, 17–614), 3 μg anti-CBP (ThermoFisher, PA1–847), and 3 μg anti-FOXA1 (ThermoFisher, PA5–27157). Immunoprecipitated DNA was detected by qPCR and normalized with input DNA. The sequences of the primers are listed in Additional file 1: Table S3.
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8

ChIP-qPCR Analysis of Mouse Keratinocytes

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Mouse keratinocytes were obtained from CELLnTEC and grown to 80% confluency in CnT-07CF media (CELLnTEC, Bern). Cells were cross-linked with 1% formaldehyde and processed by the Magna ChIP G Chromatin Immunoprecipitation Kit (Millipore). Antibodies used were RR-14,58 (link) H129 (Santa Cruz, Dallas, TX, USA) and normal rabbit IgG. Purified immunoprecipitated DNA was used for real-time qPCR.
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9

Ezh2-Mediated Chromatin Immunoprecipitation

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Day 6 uteri from the control and Ezh2 uKO were used. Uterine tissues surrounding the embryos were longitudinally opened at the mesometrial side and kept at −80 °C until use. Endometrial tissues were disrupted with 35 strokes in a Dounce homogenizer on ice, with a loose-fitting pestle in PBS-containing protease inhibitor cocktail and phosphatase inhibitors 2 and 3 (Sigma, St. Louis, MO, USA). After centrifugation with 1000g for 5 min, pellets were received in the nuclei EZ lysis buffer (Sigma) to isolate the nuclei. Native ChIP was then performed as previously described [63 (link)], with some modifications. For the fragmentation, chromatins were treated by 20 U/μl MNase at 37 °C for 5 min. Input DNA was analyzed with a 2100 Bioanalyzer system using High-Sensitivity DNA Reagent kit (Agilent, Santa Clara, CA, USA) to confirm DNA fragmentations at approximately 200–300 bps. Chromatin immunoprecipitation was performed using Magna ChIP G-Chromatin Immunoprecipitation Kit (Millipore, Burlington, MA, USA) following the manufacturer’s protocol. Anti-H3K27me3 antibody (39155, Active motif, Carlsbad, CA, USA) or anti-rabbit IgG (2729, Cell Signaling Technology) was used to precipitate the target chromatins. Chromatin-immunoprecipitated DNAs were purified by extracting phenol–chloroforms.
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10

Chromatin Immunoprecipitation Protocol for RelA

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Cells were grown to 80% confluence, and crosslinking was performed with 1% formaldehyde for 10 min. ChIP assays were performed using a Magna ChIP G Chromatin Immunoprecipitation Kit (Millipore) according to the manufacturer’s instructions. After immunoprecipitation with an antibody to RelA (Cell Signaling Technology, 8242) or normal rabbit IgG, protein-DNA crosslinks were reversed. DNA was then purified to remove the chromatin proteins and analysed by quantitative real-time PCR using the Qiagen EpiTect ChIP qPCR Primers (Cat# GPH1006956(-)01A).
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