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4 protocols using ab58023

1

Immunofluorescence Imaging of HCN4 and SGO1

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Cells were plated on 0.2% gelatin-coated coverslips and cultured for 3 days. Cultured cells were washed twice with 0.1 M phosphate-buffered saline (PBS) and fixed with paraformaldehyde (4%) in PBS for 10 min at room temperature, followed by several washes in PBS. Cells were subsequently incubated in PBS containing 2% normal goat serum for 30 min to block non-specific binding. They were then incubated with rabbit polyclonal anti-HCN4 antibody (1:200; APC-052, Alomone Labs) mixed with mouse monoclonal anti-SGO1 (1:200; ab58023, Abcam) in 2% normal goat serum PBS at 4 °C overnight. After washing with PBS, the cells were incubated with Alexa 488-conjugated goat anti-rabbit secondary antibody (1:1000; A-11078, Thermo Fisher Scientific) and an Alexa 555-conjugated goat anti-mouse secondary antibody (1:1000; A-21422, Thermo Fisher Scientific) for 1 h at room temperature. Nuclei were stained with 1 µM TOPRO3. Negative controls were performed by omitting the primary antibodies from the incubation solution. The fluorescence images were obtained with a Zeiss LSM‐710 inverted confocal laser scanning microscope (Carl Zeiss Meditec GmbH, Germany) and ZEN2.6 software was utilized for image collection.
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2

Western Blot Analysis of Cell Signaling Proteins

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Protein lysates were extracted from fibroblasts. A total of 25 μg of proteins were loaded on 12% sodium dodecyl sulfate–polyacrylamide gel electrophoresis (4561034; Bio-Rad, Hercules, CA) and transferred to a nitrocellulose membrane. Membranes were probed against SGO1 (mouse monoclonal, ab58023; Abcam, Cambridge, UK), BUB1 (mouse monoclonal, sc-365685; Santa Cruz, Dallas, TX), SM22α (rabbit polyclonal, sc-50446; Santa Cruz), and TPM1 (rabbit polyclonal, sc-28543; Santa Cruz) primary antibodies diluted 1:200 followed by horseradish-peroxidase–conjugated secondary antibodies. The blots were developed using SuperSignal (34580; Thermo Scientific). Signal intensity was quantified using ImageJ software (v.1.48; National Institutes of Health, Bethesda, MD).45 (link)
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3

Antibody Panel for Protein Analysis

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The following antibodies were used: anti-SGO1 mouse monoclonal (ab58023, Abcam); anti-SGO1 rabbit polyclonal (GTX117103, GeneTex, and ab21633, Abcam); anti-MYCN mouse monoclonals OP13 (Calbiochem), NB200-109 (Novus Biologicals), and sc-53993 (Santa Cruz Biotechnology); anti-MYCN rabbit polyclonal (#9405, Cell Signaling Technology); anti-phospho-histone H2A.X (Ser139) mouse monoclonal (JBW301, Millipore); anti-SMC3 rabbit polyclonal (A300-060A, Bethyl laboratories); anti-β-ACTIN (8H10D10) mouse monoclonal (#3700, Cell Signaling Technology); normal mouse IgG (#12–371, Millipore); goat anti-mouse IgG (H+L) secondary antibody, Alexa Fluor® 488 conjugate (A-11001, Thermo Fisher Scientific); anti-mouse IgG, HRP-linked (#7076S, Cell Signaling Technology); and anti-rabbit IgG, HRP-linked (#7074S, Cell Signaling Technology) antibodies.
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4

Western Blot Protein Analysis

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Western blot analysis was performed on Mini-PROTEAN® TGX™ Gels (Bio-Rad Laboratories). Proteins were electrotransferred onto Immobilon-P PVDF membrane (millipore, pore size 0.45 mm). After blocking 1 h in Tris-HCl-buffered saline with 0.2% Tween-20 (TBST) and 5% non-fat milk (Bioshop® Canada), the membranes were incubated overnight with primary antibody in TBST containing 2% non-fat milk. The rabbit polyclonal anti-HCN2 antibody (1:500; APC-030, Alomone Labs), rabbit polyclonal anti-HCN4 antibody (1:1000; APC-052, Alomone Labs), mouse monoclonal anti-SGO1 antibody (1:1000; ab58023, Abcam), mouse monoclonal anti-GAPDH antibody (1:1000; 10R-G109a, Fitzgerald), mouse monoclonal anti-GFP antibody (1:1000; MA5-15256, Invitrogen), rat monoclonal anti-mCherry (1:1000; M11217, Invitrogen) and mouse monoclonal anti-PP2A C subunit (1:1000; SAB4200266, Sigma-Aldrich) were utilized to detect HCN2, HCN4, SGO1, GAPDH, GFP, mCherry and PP2A C proteins respectively. Detection was carried out by the use of horseradish peroxidase conjugated secondary antibodies (Donkey anti rabbit secondary antibody, 1:5000, #711035152, Jackson; Donkey anti mouse secondary antibody, 1:5000, #711035151, Jackson; Donkey anti rat secondary antibody, 1:5000, #A18745, Invitrogen), photographic film (Agfa NV) and the Western Lighting® plus ECL kit (PerkinElmer).
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