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3 protocols using anti myc cy3

1

Immunofluorescence Staining of Tagged Proteins

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Formaldehyde-fixed, permeabilized cells cultured on glass coverslips were incubated with primary antibodies, anti-myc-Cy3 (Sigma), anti-Flag produced in rabbit (Sigma), and anti-HA-FITC (Sigma) for 1 hour at 37°C, followed by incubation with secondary anti-rabbit-Cy5 (KPL) and DAPI. Cells were analysed on a confocal laser scanning microscope (Karl Zeiss).
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2

Comprehensive Antibody Characterization for Wnt Signaling

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Human recombinant full-length RSPO proteins (RSPO1–4) were purchased from R&D Systems, and human recombinant RSPO1 furin domain (aa 1–146, C-terminal His-tag) was from Sino Biological. For western blot and immunoprecipitation, anti-HA (Invitrogen cat #71–5500 or Cell Signaling cat #2367), anti-Myc (Cell Signaling cat #2276), anti-phosphorylated and total LRP6 (Cell Signaling cat #2568 and #3395), anti-β-actin (Cell Signaling cat #4970), anti-LGR4 (7E7) (7 (link)), anti-FLAG (Sigma cat #F7425), anti-LGR5 (Abcam cat #ab75850), anti-RNF43 (SC37) (31 ), and anti-GAPDH (Cell Signaling cat #2118) were used. For ICC, anti-HA-Alexa 488 (Cell Signaling cat #2350), anti-Myc-Cy3 (Sigma cat #C6594s), TO-PRO-3 Iodide (Thermo Fisher cat #T3605), and anti-human-Alexa 488 or –Alexa 555 (Invitrogen cat #A11013 and #A21433) were used. Anti-pan FZD antibody (18R5) were prepared as described before (46 (link)). For PLA and IP, anti-LGR5 (8F2) and anti-LGR4 (8D2) antibodies were produced as described (28 (link), 35 ). Duolink® In Situ PLA probes (anti-mouse PLUS and MINUS, anti-rabbit PLUS and MINUS, and anti-human PLUS and MINUS) and Duolink® In Situ PLA detection reagents green were purchased from Sigma. For TR-FRET, Lance Europium-labeled anti-6X His antibody, Lance Ultra Ulight-anti-6xHis, and ULight anti-Myc were purchased from PerkinElmer, and anti-HA-Alexa 647 were from Invitrogen.
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3

Visualization of Internalized Phage Particles

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For staining of internalized phage particles on live cells, approximately 70,000 HMEC-1 cells were seeded per well in a 4-well permanox chamber slide a day in advance. One hour prior to addition of phage 100 μM chloroquine (Sigma-Aldrich) was added to the media. The cells were moved to room temperature and phage or soluble antibody was added directly to the media and incubated for 30 minutes. The cells were washed one time in fresh medium and moved to 37 °C for 2 hours. After incubation the cells were washed 3 times with EGM and 3 times with PBS and fixed in 2% PFA for 10 minutes at room temperature, residual PFA was removed by PBS. The cells were permeabilized using 0.1% TritonX100 for 15 minutes at RT. The permeabilized cells were blocked 1 hour in 2% mPBS. The cells were incubated 2 hours with mouse anti-M13 antibody (GE Healthcare) (1:4000) in 2% mPBS or anti-Myc-Cy3 (Sigma-Aldrich) (1:1000) For phage staining anti-M13, this was followed by 2 times wash in PBS and incubation with alexa-488 conjugated goat anti-mouse antibody (GE Healthcare) (1:500) in 2% mPBS for minimum 1 hour. The cells were washed 2 times in PBS and mounted using Vectashield mounting media (Vectorlabs).
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