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3 protocols using anti tfpi2

1

Western Blot Quantification Protocol

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Protein concentrations were measured using the Bio-Rad Bradford protein assay. The proteins were separated by 12% SDS-polyacrylamide gel electrophoresis, transferred to IMMOBILON PVDF membranes (Millipore) and incubated overnight at 4°C in blocking buffer containing 2% ECL blocking reagent (GE Healthcare) and 0.1% Tween 20 in PBS. The membranes were probed with either anti TFPI-2 (1:500, SantaCruzBiotechnology) or anti α-tubulin (1:1000, Sigma-Aldrich) antibody for 1h at room temperature. Antibody binding was detected with anti-mouse IgG-HRP (1:10,000, Sigma Aldrich) for 45min at room temperature. The signals were detected with ECL Prime (GE-Healthcare). Densitometry of protein bands was analysed with GelPro Analyzer Software (Media Cybernetics).
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2

Western Blotting of HEK293 Cell Lysates

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Western blotting of HEK293 lysates were done as described previously46 (link). Antibodies were rabbit anti-KDM5A (NB110-40499; Novus Biologicals Inc., Centennial, USA; 1:2,000 dilution), anti-LSD1 (ab17721; Abcam Inc., Cambridge, UK; 1:2,000 dilution), anti-Flag (M185; MBL Inc., Nagoya, Japan; 1:2,000 dilution), anti-TFPI2 (sc-48380; Santa Cruz Biotechnology Inc., Santa Cruz, CA; 1:1,000 dilution), or anti-β-actin (sc-47778; Santa Cruz Biotechnology Inc.; 1:1,000 dilution).
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3

Immunoprecipitation of TFPI2, SMAD7, TGFBR1, TGFBR2

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Cells were lysed with cell lysis buffer (#P0013, Beyotime). Whole cell lysates were obtained after centrifugation, and protein concentration was determined. The protein extracts were diluted to 1 μg/μl in phosphate buffer saline (PBS) and then incubated with 1 μg of the indicated antibody and 60 μl protein A agarose beads for 2 h at 4 °C. The antibodies for IP include anti-TFPI2 (#sc-48380; Santa Cruz), anti-SMAD7 (#sc-101152, Santa Cruz), anti-TGFBR1 (#sc-518018, Santa Cruz), and anti-TGFBR2 (#sc-17792, Santa Cruz). IgG was used as a negative control. Immunocomplexes obtained by centrifugation were separated by SDS-PAGE, and immunoblotting was performed as previously described.
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