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3 protocols using rabbit anti ha antibody

1

Protein Expression and Purification Protocol

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Biotinylated human IgG, goat-anti-chicken DyLight®633 (GAC633), goat-anti-chicken DyLight®487 (GAC487), donkey-anti-rabbit DyLight®633 (DAC633), goat-anti-human IgG DyLight®633, and goat-anti-chicken HRP conjugate were purchased from Immunoreagents (Raleigh, NC). Chicken anti-c-myc antibody, rabbit-anti-HA antibody, streptavidin R-phycoerythrin conjugate (SA-PE), Dynabeads Biotin Binder (streptavidin-coated beads), Dynabeads His-Tag Isolation and Pulldown beads, High-fidelity Phusion polymerase, and CloneJET PCR cloning kit (K1231) were purchased from Thermo-Fisher (Waltham, MA). Mouse anti-penta-His antibody-Alexa Fluor 647 conjugate and Ni-NTA agarose were obtained from Qiagen (Valencia, CA). Frozen-EZ Yeast Transformation Kit, Zymoprep Yeast plasmid Miniprep II kit, Quick-DNA Miniprep Plus Kit were purchased from Zymo Research (Irvine, CA). All restriction enzymes were purchased from New England BioLabs (Ipswich, MA). Gene fragments were purchased from Integrated DNA Technologies (IDT; Coralville, IA). Oligonucleotide primers were purchased from IDT or Eton Biosciences (Raleigh, NC). Sequences of all primers and G-blocks are included in Table S1 (primers) and Table S2 (gene fragments). The composition of yeast culture media used was as previously described31 (link).
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2

Phosphorylation Analysis of Cellular Proteins

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Crystal violet (C‐3886), mouse anti‐phospho‐PKR (pThr446) antibody, anti‐c‐Myc (C3956) antibody, sodium pyruvate (S8636), and 0.25 mg/mL trypsin were purchased from Sigma‐Aldrich and used at the indicated final concentrations. Methylcellulose (118‐084‐721) was purchased from MP Biomedical. Anti‐eIF2α (9722), anti‐phospho‐eIF2α (Ser 51) (9721), and β‐actin antibodies were purchased from Cell Signaling Technology®. Mouse anti‐PKR (K‐17) antibody, goat anti‐mouse IgG, F(ab′)2‐HRP (sc‐3696), and goat anti‐rabbit IgG, F(ab′)2‐HRP (sc‐3837) secondary antibodies were purchased from Santa Cruz Biotechnology. Rabbit anti‐HA antibody was purchased from ThermoFisher Scientific. SPPV L1 protein antiserum was prepared by our laboratory.
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3

Localization of PIEZO2 in N2A cells

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N2A cells were co-transfected with PIEZO2-HA-IRES-GFP or IDRdel constructs and with a plasmid encoding the red fluorescent protein mScarlet fused to a farnesylation signal sequence in its C-terminus to target it to the plasma membrane. Three days after transfection, cells were washed once with PBS and fixed with 4% PFA for 10 min at room temperature, washed 3 times for 5 min with PBS and permeabilised for 1 h at room temperature (permeabilization buffer: 2,5% donkey serum (Sigma), 1% BSA, 0.1% Triton X-100, 0.05% Tween-20, in PBS). Samples were then incubated overnight at 4 °C with a 1:500 dilution of rabbit anti-HA antibody (Thermo Fisher Scientific) in PBS 1% BSA. After 3 washes of 5 min, cells were incubated for 1 h with a 1:1000 dilution of AlexaFluor-647 donkey anti-rabbit (Life technologies, diluted in PBS 1% BSA) and washed 3 more times. Coverslips were mounted on slides with FluoProbe mounting media that contain DAPI (Interchim). Confocal images were acquired with a SP8 confocal microscope (Leica) and a 63x oil-immersion objective. Images were analyzed offline with Fiji (v2.3.0/1.53f).
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