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6 protocols using rabbit anti lrp6

1

Immunoblotting with Diverse Antibodies

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The following antibodies were used for immunoblotting: Rat anti-HA (Roche, ROAHAHA), Rabbit anti- FLAG (Proteintech, 20543-1-AP), Mouse anti-GAPDH (Developmental Studies Hybridoma Bank, hGAPDH-2G7), Rabbit anti-USP46 (Proteintech, 13502-1-AP), Mouse anti-Tubulin (Developmental Studies Hybridoma Bank, E7), Mouse anti-β-catenin (BD Transduction Laboratory, 610154), Rabbit anti-Axin1 (Cell Signaling Technology, 2087), Rabbit anti-Insulin Receptor β (Cell Signaling Technology, 3025), Rabbit anti-LRP6 (Cell Signaling Technology, 2560), Rabbit anti-WDR20 (Bethyl Laboratories, A301-657A), Rabbit anti-WDR48 (UAF1) (Proteintech, 16503-1-AP), Goat anti-rat IgG H + L-HRP (Thermo, 31470), Goat anti-mouse IgG H + L-HRP (Promega, W4021), Goat anti-rabbit IgG H + L-HRP (Promega, W4011). All primary antibodies were used at 1:1000 dilution except anti-FLAG (1:2000), anti-GAPDH (1:500), and anti-WDR20 (1:2500). All secondary HRP antibodies were used at 1:5000 dilution.
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2

Western Blot Analysis of Wnt Signaling

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Protein extraction was performed with RIPA buffer (NEB) in the presence of protease and phosphatase inhibitors (Sigma) and quantified using the Bio-Rad DC protein assay (Bio-Rad). Total protein lysates (10–15 ug) were resolved in Bolt bistris plus 4–12% gels (Life technologies). PVDF membranes were blocked for 2 h in 5% (w/v) BSA TBST buffer and the following primary antibodies diluted in blocking buffer were used: Mouse anti-GAPDH (1/5000, Abcam), mouse anti-B-catenin (sc7963, 1/1000, Santa Cruz Biotechnology), rabbit anti-P-Ser552 B-catenin (1/500, Cell signaling), rabbit anti-P-Ser675 B-catenin (1/500, Cell signaling), rabbit anti-LRP6 (1/500, Cell signaling), rabbit anti-P-LRP6 (1/500, Cell signaling). Incubation was performed overnight at 4C and primary antibodies were detected with anti-rabbit and anti-mouse HRP antibodies (Abcam) using the Luminata Crescendo Western HRP substrate (Millipore). Protein samples from 3 independent differentiations were analysed except the XAV treatment analysis where 2 rounds of differentiation were performed.
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3

Western Blot Analysis of Signaling Pathways

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Protein lysates from EBs were isolated in RIPA lysis buffer as previously described [8] (link). Protein lysates were separated on 8–10% SDS-PAGE gels as previously described (). Antibodies used included rabbit anti-pSmad1, rabbit anti-Smad1/5, rabbit anti-pSmad2, rabbit anti-Smad2/3, rabbit anti-pErk, rabbit anti-Erk, rabbit anti-p-p38, rabbit anti-p38, rabbit anti-Lrp6, rabbit anti-pLrp6 (all Cell Signaling Technology, USA), mouse anti-beta-catenin (Santa Cruz Biotechnology, USA), cardiac myosin heavy chain (Abcam, USA), anti-CS-E antibody GD3G7 [54] (link), [55] (link), [56] (link), and mouse anti-alpha-tubulin (Santa Cruz Biotechnology, USA).
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4

Immunoblotting and Immunofluorescence Protocols

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For Immunoblotting: mouse anti-α-Tubulin (Sigma Aldrich, T5168, 1:10,000); mouse anti-actin (MP Biomedicals (CLONE C4), 08691002, 1:10,000); rabbit anti-LRP6 (Cell Signaling (C5C7), #2560, 1:1000); rabbit anti-Phospho-LRP6 (Ser1490) (Cell Signaling, #2568, 1:500). All goat secondary antibodies were conjugated with either Alexa Fluorphores (Life Technologies, A-21109, 1:8000) or IRDyes (LI-COR, P/N 926–32210, 1:8000). For immunofluorescence: rabbit anti-Ki67 (Abcam, 15580, 1:100), rabbit anti-Lysozyme (Dako, A0099, 1:500), mouse anti-ChgA (Santa Cruz (C-12), sc-393941, 1:200). As secondary antibodies goat anti-rabbit IgG-488 (Life Technologies, A-21441, 1:300) and goat anti-mouse-IgG-568 (Life Technologies, A-11004, 1:300) were used. Hoechst 33342 (Sigma, B-2261) was used at 1:500 and Phalloidin (Ph647) (Cell Signaling, #8940) at 1:50.
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5

Western Blot Analysis of LRP6, OCT4A, and β-Catenin

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Protein was isolated with cOmplete Lysis-M plus protease/phosphatase inhibitors (Roche) and quantitated by Bradford assay (BioRad). 50 μg protein was separated in 4–12% Bis-Tris mini-gels (Life Technologies), transferred to nitrocellulose membranes via iBlot (Life Technologies), and blocked in 5% BSA diluted in 1x TBS-0.1% Tween (TBS-T) for 1 h while rocking. The following primary antibodies diluted in 5% BSA were incubated overnight at 4 °C: rabbit anti- LRP6 (1:2,000; Cell Signaling; C47E12), rabbit anti-phospho-LRP6 (1:2,000; Cell Signaling; S1490), rabbit anti-OCT4A (1:2,000; Cell Signaling; C30A3), rabbit anti-β-catenin (1:2,000; Cell Signaling; D10A8), mouse anti-active β-catenin (1:2,000; Millipore; 05-665), and mouse anti-β-actin (1:20,000; Sigma; A3853). Membranes were rinsed in TBS-T, followed by incubation with HRP-goat anti-mouse IgG (1:20,000; Sigma-Aldrich; SAB3700993) and HRP-donkey anti-rabbit IgG (1:20,000; Sigma-Aldrich; SAB3700978) for 1 h while rocking. Membranes were rinsed in TBS-T, detected with Clarity Western ECL (BioRad), and exposed in a ChemiDoc XRS+ system (BioRad).
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6

Western Blot Analysis of LRP6, OCT4A, and β-Catenin

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Protein was isolated with cOmplete Lysis-M plus protease/phosphatase inhibitors (Roche) and quantitated by Bradford assay (BioRad). 50 μg protein was separated in 4–12% Bis-Tris mini-gels (Life Technologies), transferred to nitrocellulose membranes via iBlot (Life Technologies), and blocked in 5% BSA diluted in 1x TBS-0.1% Tween (TBS-T) for 1 h while rocking. The following primary antibodies diluted in 5% BSA were incubated overnight at 4 °C: rabbit anti- LRP6 (1:2,000; Cell Signaling; C47E12), rabbit anti-phospho-LRP6 (1:2,000; Cell Signaling; S1490), rabbit anti-OCT4A (1:2,000; Cell Signaling; C30A3), rabbit anti-β-catenin (1:2,000; Cell Signaling; D10A8), mouse anti-active β-catenin (1:2,000; Millipore; 05-665), and mouse anti-β-actin (1:20,000; Sigma; A3853). Membranes were rinsed in TBS-T, followed by incubation with HRP-goat anti-mouse IgG (1:20,000; Sigma-Aldrich; SAB3700993) and HRP-donkey anti-rabbit IgG (1:20,000; Sigma-Aldrich; SAB3700978) for 1 h while rocking. Membranes were rinsed in TBS-T, detected with Clarity Western ECL (BioRad), and exposed in a ChemiDoc XRS+ system (BioRad).
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