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3 protocols using anti phospho β catenin thr41 ser45

1

Western Blot Analysis of Wnt Signaling

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Cytosolic fractions were prepared as previously described30 (link). Proteins were separated by SDS-PAGE in a 4–12% gradient gel (Invitrogen, Carlsbad, CA, USA) and transferred to a nitrocellulose membrane (Bio-Rad, Hercules, CA, USA). The membrane was blocked with 5% nonfat milk and probed with anti-β-catenin (BD Transduction Laboratories, 610154, 1:1000), anti-phospho-β-catenin (Ser33/37/Thr41) (Cell Signaling Technology, #9561S, 1:1000), anti-phospho-β-catenin (Thr41/Ser45) (Cell Signaling Technology, #9565S, 1:1000), anti-Axin1 (Cell Signaling Technology, #2087S), anti-Axin2 (Cell Signaling Technology, #2151S, 1:1000), anti-C/EBPβ (Santa Cruz Biotechnology, sc-150, 1:500), anti-cyclinD1 (Santa Cruz Biotechnology, sc-20044, 1:500), anti-c-myc (Santa Cruz Biotechnology, sc-40, 1:500), anti-GFP (Invitrogen, A11122, 1:1000), and anti-actin (Sigma-Aldrich, A1978, 1:2000) antibodies. The membranes were then incubated with horseradish-peroxidase-conjugated anti-mouse IgG (Santa Cruz Biotechnology, sc-2004, 1:1000) or anti-rabbit IgG (Santa Cruz Biotechnology, sc-2031, 1:1000) and visualized using the ECL system (Santa Cruz Biotechnology, sc-2048).
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2

Immunoprecipitation and Western Blot Analysis

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Cell lysates (50 μg) were incubated overnight at 4 °C with either anti-β-catenin or GSK3β at a 1:100 dilution. Dynabeads Protein G (Life Technologies) were added to the suspension for 2 h at 4 °C and the specific protein immunoprecipitated. After denaturing, the proteins were electrophoresed, transferred, and blocked. Primary antibodies (anti-phospho-GSK3β (Ser9), Cell Signaling no. 9323, anti-phospho-β-catenin (Thr41/Ser45), Cell Signaling no. 9565, and anti-phospho-β-catenin (Ser33/37/Thr41, Cell Signaling no. 9561)) were diluted 1:1000 in TBST and incubated with the blot overnight at 4 °C. The anti-rabbit HRP secondary antibody (1:2000) was incubated with the blot and proteins were detected using Luminol reagent (Santa Cruz). Band intensity was determined by densitometry, with MHC used as the loading control.
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3

Immunoprecipitation and Western Blot Analysis of Phosphorylated GSK3β and β-Catenin

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Cell lysates (50μg) were incubated overnight at 4°C with either anti-β-catenin or GSK3β at a 1:100 dilution. Dynabeads Protein G (Life Technologies) were added to the suspension for 2 hours at 4°C and the specific protein immunoprecipitated. After denaturing, the proteins were electrophoresed, transferred, and blocked. Primary antibodies (anti-phospho-GSK3β (Ser9), Cell Signaling no. 9323, anti-phospho-β-catenin (Thr41/Ser45), Cell Signaling no. 9565, and anti-phospho-β-catenin (Ser33/37/Thr41, Cell Signaling no. 9561) were diluted 1:1000 in TBST and incubated with the blot overnight at 4°C. The anti-rabbit HRP secondary antibody (1:2000) was incubated with the blot and proteins were detected using Luminol reagent (Santa Cruz). Band intensity was determined by densitometry, with MHC used as the loading control.
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