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6 protocols using sc 484

1

Western Blot Analysis of Transcription

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Western blot analysis was performed as previously described 46 using approximately 30 μg of proteins from cells boiled in Laemmli buffer (50mM Tris pH6.8, 2% sodium dodecyl sulphate, 5% β-mercaptoethanol, 10% glycerol, 0.1% Bromophenol Blue) and antibodies against pol II (sc-9001, Santa Cruz), pSer2 (Ab5095, Abcam), pSer5 (ab5131, Abcam), mitotic phosphoproteins/CC3 (ab78272, Abcam), which recognizes Spt5P 44 (link), Spt5 (sc-28678, Santa Cruz), α-tubulin (200-301-880, Rockland), actin (sc-1615, Santa Cruz), Pcf11 (A303-706A, Bethyl Laboratories), Tyr1P (Active Motif 61384), Thr4P (Active motif 61362), Ser7P (Active motif 61088), Cstf64 (A301-092A, Bethyl Laboratories) and CDK9 (sc-484, Santa Cruz). Validation for all antibodies is provided on the manufacturers’ websites.
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2

Western Blot Analysis of Transcription

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Western blot analysis was performed as previously described 46 using approximately 30 μg of proteins from cells boiled in Laemmli buffer (50mM Tris pH6.8, 2% sodium dodecyl sulphate, 5% β-mercaptoethanol, 10% glycerol, 0.1% Bromophenol Blue) and antibodies against pol II (sc-9001, Santa Cruz), pSer2 (Ab5095, Abcam), pSer5 (ab5131, Abcam), mitotic phosphoproteins/CC3 (ab78272, Abcam), which recognizes Spt5P 44 (link), Spt5 (sc-28678, Santa Cruz), α-tubulin (200-301-880, Rockland), actin (sc-1615, Santa Cruz), Pcf11 (A303-706A, Bethyl Laboratories), Tyr1P (Active Motif 61384), Thr4P (Active motif 61362), Ser7P (Active motif 61088), Cstf64 (A301-092A, Bethyl Laboratories) and CDK9 (sc-484, Santa Cruz). Validation for all antibodies is provided on the manufacturers’ websites.
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3

Chromatin Immunoprecipitation: Antibody Panel

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GFP (ab290, 5 µl used; abcam, Cambridge, MA), BRD4 (10 µg; ref. 49 (link)), CDK9 (sc-8338, 10 µg; sc-484, 10 µg; both from Santa Cruz Biotechnology), H3 (ab1791, 5 µg; abcam), acetyl H3 (06–599, 5 µg; Millipore, Billerica, MA), H3 acetyl K27 (ab4729, 2 µg; abcam), acetyl H4 (06–866, 5 µg; Millipore), H4 acetyl K12 (ab1761, 5 µg; abcam), Pol II (pan) (sc-899, 5 µg; Santa Cruz Biotechnology), Ser2P Pol II (ab5095, 5 µg; abcam), Ser5P Pol 11 (ab5131, 5 µg; abcam), or normal rabbit IgG (12–370, 5 µg; Millipore).
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4

Western Blotting Analysis of RNA Pol II

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Western blotting was carried out as described previously [16] (link) using proteins harvested from cells boiled in Laemmli buffer (50 mM Tris (pH6.8), 2% sodium dodecyl sulphate, 5% β-mercaptoethanol, 10% glycerol, 0.1% bromophenol blue) and antibodies against pol II diluted 1∶200 (sc-899, Santa Cruz), pol II CTD Ser2P diluted 1∶1000 (ab5095, Abcam), Ser5P diluted 1∶1000 (ab5131, Abcam), Ser7P diluted 1∶200 [29] (link), Tyr1P diluted 1∶200 (61383, Active motif), RPAP2 diluted 1∶1000 (17401-1-AP, Proteintech), CTCF diluted 1∶1000 (07–729, Millipore), Myc-tag diluted 1∶1000 (ab9132, Abcam), CDK9 diluted 1∶500 (sc-484, Santa Cruz) and α-tubulin diluted 1∶1000 (200-301-880, Tebu-bio).
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5

ChIP Analysis of Transcriptional Regulation

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HeLa cells were transfected with pcDNA3, Myc-ICP22 and Myc-193-256 vectors using Lipofectamine 2000 (Invitrogen) according to the manufacturer's instructions before being subjected to ChIP analysis as detailed [43] (link). ChIP samples were analyzed by qRT-PCR using QuantiTect SYBR Green PCR (Qiagen) and Rotor-Gene RG-3000 (Corbett Research). Error bars indicate the standard deviation from at least three independent experiments. Final ChIP values are expressed as a percentage of the total DNA input after deduction of the signal obtained using rabbit IgG as a negative control. Antibodies against pol II (sc-899) and CDK9 (sc-484) were obtained from Santa Cruz Biotechnology. Antibodies against Ser2P (ab5095), Ser5P (ab5131) and the Myc-tag (ab9132) were obtained from Abcam. The sequences of primers are given in Table 1.
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6

Western Blot Analysis of Infected Cells

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Western blot analyses of infected and mock-infected HFFs were performed as previously described [27 (link),66 (link)]. Antibodies specific for CDK9 (sc-484, Santa Cruz Biotechnology, Dallas, TX, USA), mAb-CDK1 (sc-54, Santa Cruz Biotechnology), pAb CDK2 (Sc-163, Santa Cruz Biotechnology), pAb-CDK7 (sc-723, Santa Cruz Biotechnology), and mAb β-actin (A5441, Sigma Aldrich, St. Louis, MO, USA) were used with an appropriate secondary antibody to detect the respective proteins.
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