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5 protocols using ab9110

1

Telomeric ChIP with Shelterin Proteins

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Telomeric ChIP was performed as previously described (Loayza and De Lange, 2003 (link)). Telomeric DNA associated with shelterin proteins was immunoprecipitated with the following crude sera or purified antibodies: crude rabbit TRF1 (#371), crude rabbit TIN2 (#865), crude rabbit TPP1 (#1151), POT1 (Abcam, ab123784), anti-HA (Abcam, ab9110) and protein G magnetic beads (Cell signaling). For ChIP of exogenously introduced TIN2 alleles, 293T cells were transfected by calcium phosphate transfection, and crosslinked and harvested 36–48 hr after transfection.
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2

Protein Interactions in Hepatocellular Carcinoma

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These experiments were performed as described previously.
11 (link),
12 (link) For Co‐IP, HCC cell lines including MHCC‐97H, Huh7‐SMYD4, Huh7 pre‐transfected with plasmids of Flag‐labeled different PRMT5 regions, and HA‐labeled SMYD4 were used. The cell protein lysates were mixed with antibodies of PRMT5 (Abcam, ab109451), SMYD4 (Proteintech, 17594‐1‐AP), HA (Abcam, ab9110), or Flag (Cell Signaling Technology, #14793) according to each experiment. Silver staining was performed using a silver stain kit SilverQuest™ (ThermoFisher Scientific) according to the manufacturer's instructions. LS‐MS detection and analysis were performed by BGI Company.
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3

Immunoblotting Analysis of Protein Complexes

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Samples were separated on 4–12% Bis–Tris polyacrylamide gel (Invitrogen) followed by transfer to Amersham™ Hybond® P 0.2 PVDF (GE Healthcare) for immunoblotting. Primary antibodies: anti- anti-ELP1 (1:250, Abcam, ab56362), anti-ELP3 (1:1000, Abcam, ab96781), anti-AAG (1:1000, custom rabbit polyclonal antibody, Covance, raised against ∆80AAG) or anti-AAG (1:1000, LSBio LS-C133325), anti-RNA pol II S2P (1:1000, Abcam, ab5095), anti-HA (1:1000, Abcam, ab9110), anti-α-Tubulin (1:10000, Cell Signaling, 2144), anti-H3 (1:1000, Abcam, ab1791), anti-GFP (1:1000, Abcam, ab290); were detected using infrared (IR) Dye-conjugated secondary antibodies (1:15000, Li-COR Bioscienecs, 827-11081 and 925-32210). The signal was visualized by using direct IR fluorescence via the Odyssey Scanner, LI-COR Biosciences.
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4

Western Blot Analysis of Protein Expression

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Protein lysates were isolated in lysis buffer and followed by the addition of sample loading buffer (4Abio, 4APA008-15), separated by 10% SDS polyacrylamide gel electrophoresis (EpiZyme, PG11X) and transferred onto PVDF membranes (Merck Millipore, IPVH00010). The membranes incubated with primary antibodies against: NAT10 (Santa Cruz, [sc-271770] or Proteintech, [13365-1-AP], 1:2 000), RNPS1 (Proteintech, 10555-1-AP, 1:2 000), HA (Abcam, ab9110, 1:4 000) and GAPDH (Cell Signaling Technology, 2118S, 1:2 000). Enhanced chemiluminescence (ECL) method with appropriate species-specific horseradish peroxidase-conjugated secondary antibodies (Proteintech, anti-rabbit [SA00001-2] 1:4 000, anti-mouse [SA00001-1] 1:4 000) were used to visualize the blots.
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5

ChIP-qPCR Analysis of CDK7 and Rpb1 in H460 and H1975 Cells

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ChIP was performed on H460 cells transfected with a control YFP or CDK7 HA construct, or on H460 and H1975 cells 6 h after treatment with DMSO, Milciclib, THZ1, or LDC4297 (10 μM) using the SimpleChIP Plus ChIP kit (Cell Signaling) following the manufacturer’s protocol. The following antibodies were used: HA (Abcam; ab9110; 1:714 dilution), Rpb1 NTD (Cell Signaling; D8L4Y; 1:147 dilution), and phospho-Ser5 Rpb1 CTD (Cell Signaling; D9N5I; 1:50 dilution). qPCR was performed as previously described using the following primers:
GLUT1 (SLC2A1) forward primer: CCCTAGTGCACCGAAGTCAC
GLUT1 (SLC2A1) reverse primer: GTACCCGGCTGTAAGGCAAG
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