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5 protocols using anti rna pol 2

1

Chromatin Immunoprecipitation with qPCR Analysis

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Example 13

Conventional ChIP-qPCR was performed. Briefly, cells were crosslinked with 1% formaldehyde at room temperature for 10 minutes followed by glycine quenching, cell lysis, nuclei isolation and lysis, and sonication to obtain 150-200 bp DNA fragments. Complexes were immunoprecipitated overnight using 10 μg of anti-HA tag (Cell Signaling 3724), anti-Flag tag (Sigma F1804), anti-H3K4me3 (AbCam ab8580), anti-RNA Pol-II (Active Motif 61083), or anti-DDX5 (Bethyl A300-523A). Real-time qPCR of purified DNA was performed using SYBR Green I MasterMix (Roche 4707516001) on the Light Cycler 48011 (Roche). qPCR primers are provided in Table 9.

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2

WT1 Binding Site Analysis in MMP9 Promoter

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Chromatin immunoprecipitation (ChIP) was performed according to manufacturer's recommendations (Active Motif, Carlsbad, CA). In brief, 106 MHH-ES cells were cross-linked with 1% formaldehyde for 10 min at 37 °C and washed three times with ice-cold PBS, followed by enzymatic shearing of the fixed chromatin per manufacturer's protocol. Next, sheared chromatin was incubated with 2 μg of either anti-WT1 (Novus Biotechnology), anti-RNA pol II, or a negative control IgG (Active Motif). Chromatin bound to the antibody was pulled down with magnetic Protein G-coated beads, washed and eluted. Following crosslink reversal, the purified DNA was subjected to PCR amplification using primers specific for the region containing the putative WT1 binding site in the MMP9 promoter, sense primer: 5’- CTGCGGGTCTGGGGTCTTGC -3; antisense primer: 5’- CGCTCCTGTGACCCCACCCC – 3’ [22 (link)]. PCR fragments were analyzed on 2% agarose 1x TAE gel containing ethidium bromide and the size (196 bp) was compared with a molecular weight marker. These results were further confirmed with quantitative PCR using the same sense and antisense primers.
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3

Chromatin Immunoprecipitation qPCR Protocol

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Conventional ChIP-qPCR was performed. Briefly, cells were crosslinked with 1% formaldehyde at room temperature for 10 min followed by glycine quenching, cell lysis, nuclei isolation and lysis and sonication to obtain 150–200 bp DNA fragments. Complexes were immunoprecipitated overnight using 10 μg of anti-HA tag (Cell Signaling 3724), anti-Flag tag (Sigma F1804), anti-H3K4me3 (AbCam ab8580), anti-RNA Pol-II (Active Motif 61083) or anti-DDX5 (Bethyl A300-523A). Real-time qPCR of purified DNA was performed using SYBR Green I MasterMix (Roche 4707516001) on the Light Cycler 480II (Roche). qPCR primers are provided in Supplementary Table 1.
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4

Autophagy Regulation in Stem Cells

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Reagent and antibody sources were as follows: acridine orange, ATRA (all-trans-retinoic acid), bafilomycin A1 (BafA1), BIX01294 trihydrochloride hydrate, DAPI (4′,6-diamidino-2-phenylindole dihydrochloride), laminin, 3-methyladenine (3MA), MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide), anti-LC3 (catalog no. L7543) and anti-β-Actin-peroxidase conjugated antibody (catalog no. A3854) (Sigma-Aldrich, Munich, Germany), anti-ATG5 (catalog no. 2630), anti-ATG7 (catalog no. 2631), anti-cleaved caspase 3 (catalog no. 9661), anti-cleaved caspase 7 (catalog no. 9491), anti-cleaved PARP (poly (ADP-ribose) polymerase-1) (catalog no. 9541), anti-SOX2 (catalog no. 3579) (Cell Signaling Technology, Beverly MA, USA), anti-ULK1 (catalog no. sc-33182) (Santa Cruz Biotechnology, Dallas, Texas, USA), anti-Beclin1 (catalog no. 612112), anti-GFAP (catalog no. 556330) (BD Pharmingen San Jose, CA, USA), anti-H3K4me3 (catalog no. 07-473), anti-H3K27me3 (catalog no. ABE44), anti-OLIG2 (catalog no. AB9610), anti-Tubulin beta III isoform (catalog no. MAB1637) (Millipore, Temecula, CA, USA), anti-H3K9me2 (catalog no. ab1220), anti-G9a (catalog no. ab40542) (Abcam, Cambridge, UK), anti-RNA Pol II (catalog no. 39097) (Active Motif, Carlsbad, CA, USA) and anti-NESTIN (catalog no. MAB1259) (R&D Systems, Minneapolis, MN, USA).
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5

Recombinant Nucleosomes with Histone Modifications

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Recombinant nucleosomes with modified histones H3K9Ac (cat# 16-0314), H3K9Bu (cat# 16-0371), and H3K18Bu (cat# 16-0373) were purchased from EpiCypher, Inc., and analyzed by Western blotting with the corresponding antibodies.
Cellular protein (25-50 μg) was fractionated using a subcellular protein fractionation kit (Thermo Fisher Scientific, cat# 78,840) according to the manufacturer's protocols. The cellular fractions were separated on a 4%–12% gradient SDS-PAGE (Criterion gels, Bio-Rad) and transferred to nitrocellulose membranes. The antibodies used included anti-H3K9Bu (Abcam, cat# ab241248), anti-H3K18Bu (PTM Bio, cat# PTM-331), anti-H3K9-crotonyl (RevMab, cat# 31-1225,099), anti-H3K27-b-hydroxybutyryl (Abcam, cat# ab241463), anti-H3K9-b-hydroxybutyryl (Thermo Fisher Scientific, PIPA5112503), anti-ACADS (Origene, cat# TA321036), anti-ACAA2 (Origene, cat# TA506126), anti-ACC1/2 (Cell Signaling Technology, cat# 36,765), anti-FASN (Abcam, cat# ab22759), anti-H3 (Active Motif, cat# 61,476), anti-H3K9Ac (Active Motif, cat# 39,917), anti-AKT1 (Millipore 07-416), anti-voltage-dependent anion-selective channel 1 (VDAC1, Genscript, cat# A01419), anti-RNA pol II (Active Motif, cat# 102,660), and anti-turboGFP (Origene, cat# TA150041). Western blotting signals were detected by an Odyssey imaging system (LI-COR) and quantitated using ImageJ.
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