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4 protocols using goat anti mouse igg conjugated to alexa fluor 488

1

Antibody Generation and Characterization

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Antibodies specific for the C-terminal region of human NMIIB (used at 1:1000) were generated in rabbits according to the method of (92 (link)). Recombinant GFP antibodies (used at 1:1000 dilution for Western blot and 1:200 for immunofluorescence) were prepared in rabbits as described (24 (link)). Rabbit polyclonal anti-Aurora-B antibodies (ab2254, 1:1000 for Western blot and 1:200 for immunofluorescence), mouse monoclonal anti-NMIIB (ab684, 1:200), and rat monoclonal anti-tubulin (ab6160, 1:200) were purchased from Abcam. Mouse monoclonal anti-FLAG (F3165, 1:1000) was purchased from Sigma-Aldrich. Mouse monoclonal anti-Phospho-Threonine (catalog no. 9386, clone 42H4, 1:500) was purchased from Cell Signaling Technology. Horseradish peroxidase–conjugated secondary antibodies, donkey anti-rat-IgG conjugated to Alexa Fluor 555, goat anti-mouse-IgG conjugated to Alexa Fluor 488, goat anti-rabbit-IgG conjugated to Cy5, and goat anti-mouse conjugated to Cy5 were from Jackson ImmunoResearch Laboratories.
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2

Zika Virus Neutralization and ADE Assay

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Neutralization of ZIKV infection by mAbs was measured using a micro-neutralization flow cytometry-based assay. Different dilutions of mAbs were mixed with ZIKV (MOI of 0.35) for 1 hr at 37°C and added to 5000 Vero cells/well in 96-well flat-bottom plates. After four days for ZIKV, the cells were fixed with 2% formaldehyde, permeabilized in PBS containing 1% fetal claf serum (Hyclone) and 0.5% saponin, and stained with the mouse mAb 4G2. The cells were incubated with a goat anti-mouse IgG conjugated to Alexa Fluor488 (Jackson Immuno- Research, 115485164) and analyzed by flow cytometry. The neutralization titer (50% inhibitory concentration [IC50]) is expressed as the antibody concentration that reduced the infection by 50% compared to virus-only control wells. ADE was measured by a flow cytometry-based assay using K562 cells. mAbs and ZIKV (MOI 0.175) were mixed for 1 hr at 37°C and added to 5000 K562 cells/well. After four days, cells were fixed, permeabilized, and stained with mAb m4G2 The number of infected cells was determined by flow cytometry, as described above.
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3

Immunofluorescence Staining of ER and FLAG-tagged CALR

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Prior to immunofluorescence staining cells were fixed with 4% paraformaldehyde, permeabilized with 0.5% Triton X-100/phosphate-buffered saline and blocked with 10% goat serum/phosphate-buffered saline. To visualize the ER chicken anti Bip IgY28 (link) was used as primary and goat anti-chicken IgG conjugated to Alexa647 (Life Technologies) as secondary antibodies. FLAG-tagged CALR variants were detected using mouse monoclonal anti-FLAG as primary (Sigma-Aldrich, St Louis, MO, USA), and goat anti mouse IgG conjugated to Alexa Fluor488 (Jackson Immuno Research Laboratories, West Grove, PA, USA) as secondary antibodies. Nuclei were counterstained with Hoechst 33342 (2μg/ml in phosphate-buffered saline). The stained samples were analysed by the laser scanning confocal microscopy system (LSM 780; Carl Zeiss, Jena, Germany) with a Plan-Apo-chromat × 60 oil immersion lens (NA 1.4).
Materials and methods on the KISMET method (cell lines, kinase inhibitors, statistics, single-dose–response values, combination of two off-target data sets, selection of kinases used for KISMET and algorithm for the calculation of the kinase rank) can be found in the Supplementary Information.
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4

Immunofluorescence Imaging of Oocytes

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Zona pellucida removal was performed by incubating oocytes briefly in acidic MEM-compatible medium (116.4 mM NaCl, 5.4 mM KCl, 10 mM HEPES, 1 mM NaH2PO4, 0.8 mM MgSO4, pH 1.5). Oocytes were then fixed in 4% paraformaldehyde (Sigma-Aldrich, P6148) in PBS at room temperature for 30 min, permeabilized in PBS with 0.1% Triton X-100 (Fisher Scientific, BP151–500) for 15 min at room temperature, and blocked in PBS with 0.1% BSA (Sigma-Aldrich, A9647) and 0.01% Tween-20 (Sigma-Aldrich, P7949) for 1 h at room temperature. Anti-Myc primary antibody (Thermo Fisher, MA1–21316) was used at a final concentration of 4 μg/ml. After overnight incubation with anti-Myc antibody, oocytes were washed three times in PBS with 0.1% BSA and 0.1% Tween-20 before incubation with 7.5 μg/ml goat anti-mouse IgG conjugated to Alexa Fluor 488 (Jackson ImmunoResearch) for 1 h at room temperature. Following three washes in PBS with 0.1% BSA and 0.1% Tween-20, oocytes were mounted in VectaShield containing 0.75 μg/ml 4-6-diamidino-2-phenylindole (DAPI; Sigma-Aldrich, D9542). Imaging was performed using a Zeiss Axio Observer Z1 microscope with AxioCam MRm Rev3 camera and ApoTome optical sectioning (Carl Zeiss, Inc.).
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