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3 protocols using abe364

1

Chromatin Immunoprecipitation of SMC Contractile Genes

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Chromatin Immunoprecipitation (ChIP) was performed as previously described (Dahl and Collas, 2008 (link); Gomez et al., 2013 (link)). In brief, passage-matched control, Myocd-LSD1, Myocd-LSD1NF SMC were fixed with 1% PFA for 10 min at room temperature. Cells were sonicated with a Bioruptor Pico (Diagenode) to obtain chromatin fragments of 200-500 base pairs. Chromatin was incubated with Protein G Dynabeads (Invitrogen, 10004D) and one of the following antibodies: H3K4me2 (2μg; #07-030, Millipore), Flag (4;g #F3165, Sigma Aldrich), H3K9me3 (2μg; ab176916, Abcam), H3K27me3 (2μg; 07-449, Sigma Aldrich), SRF (2μg; sc-13029, Santa Cruz), KLF4 (2μg; sc-20691, Santa Cruz), TET2 (5μg; ABE364, Millipore), H3ac (2μg; 06-599, Millipore), rabbit IgG (Abcam, ab171870) or mouse IgG (Abcam, ab37355). Genomic DNA was extracted with phenol-chloroform from immunoprecipitated (IP) and non-immunoprecipitated (INPUT) samples. Histone modification and protein enrichment was measured by qPCR using primer sets targeting CArG regions of the SMC contractile genes. Results were expressed as IP/INPUT. Primers used for ChIP-qPCR are listed in Key Resources Table.
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2

Comprehensive Western Blot Antibody Panel

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For western blot, the following antibodies were used at the dilutions indicated:
Anti-FLAG (1:3000, F3165, Sigma-Aldrich); Anti-myc (1:3000, 2276, CST); Anti-HA (1:750, 3724, CST); Anti-Tubulin (1:20000, T6199, Sigma-Aldrich); Anti-Drosha (1:2000, 3364, CST; 1,2000, SC393591, Santa Cruz Biotechnology; 1:2000, ab12286, abcam); Anti-Dnmt1 (1:2000, 5032, CST); Anti-Dnmt3A (1:3000, SC20703, Santa Cruz Biotechnology); Anti-Dnmt3B (1:3000, SC52922, Santa Cruz Biotechnology); Anti-Dnmt3L (1:1000, 12309, CST); Anti-Uhrf1 (1:800, SC98817, Santa Cruz Biotechnology); Anti-Histone H3 (1:2000, ab1791, abcam); Anti-Tet1 (1:1000, 09–872, Millipore); Anti-Tet2 (1:1000, ABE364, Millipore); Donkey anti-rabbit HRP (1:5000, NA934V, GE Healthcare); Sheep anti-mouse HRP (1:5000, NA931V, GE Healthcare).
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3

Pluripotency Protein Expression Analysis

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Cells were lysed in SDS buffer. The protein concentration was measured by BCA assay kit (Thermo). Equal amounts of cell lysates were loaded, blotted onto a polyvinylidene difluoride (PVDF) membrane, and probed with the following primary antibodies: Oct4 (SC-8628, 1:1000, Santa Cruz), Sox2 (SC-17320, 1:1000, Santa Cruz), Tet1 (ab191698, 1:500, Abcam, Cambridge, UK), Tet2 (ABE364, 1: 1000, Millipore), and GAPDH (ab8245, 1:4000, Abcam). Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) was used as the loading control. After incubation with the appropriate secondary antibodies, signals were visualized by enhanced chemiluminescence (GE systems, Fairfield, USA).
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