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4 protocols using anti mouse igg alexa fluor 488 conjugate

1

Histone H2B Binding Assay in J774A.1 Cells

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J774A.1 cells, cultured on glass-based dishes, were preincubated with anti CD16/CD32 mAb (93, Biolegend) to block the FcγRII/III receptors and incubated with anti-histone H2B mAb (5HH2-2A8, Millipore, 1:200 dilution) and either 100 µg/ml Bt-BSA or Bt-AGEs at 4 °C for 15 min in HBSS-BSA. After washing three times with PBS (−), the cells were stained with streptavidin-Alexa Fluor 568 conjugate (1:1,000 dilution, Invitrogen) and anti-mouse IgG-Alexa Fluor 488 conjugate (1:1,000 dilution, Invitrogen) at 4 °C for 15 min in HBSS-BSA. After washing, the stained cells were fixed with 4% paraformaldehyde in PBS (−) for 10 min at room temperature and further stained with 1 µg/ml 4’,6-Diamidino-2-phenylindole (DAPI, Dojindo). Fluorescent images were obtained using a confocal microscope (FV1200, Olympus) and analyzed by Olympus software (FV10-ASW, Olympus).
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2

Quantifying Epithelial Cell Markers in Lung Tissue

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For measurement of epithelial cell marker expression in the lung, it was stained with anti-EpCAM (sc-66020, Santa Cruz Biotechnology). The lung-embedded paraffin was sliced into 4 μm sections, and the paraffin was dissolved. It was boiled with Antigen Retrieval solution (0.1 M Sodium Citrate, pH 6) at 121 °C for 1 min. After washed, it reacted with peroxidase buffer (Peroxidase, Methanol). Additionally, then, it was blocked with 10% normal goat serum for 1 h at room temperature and incubated with antibody for overnight. A secondary antibody (anti-mouse IgG, Alexa Fluor 488 conjugate, #A32731, Invitrogen) was reacted for 1 h, and mounted by Fluoroshield with DAPI (#6057, Sigma-Aldrich, St. Louis, MO, USA). Slides were observed by microscope (EVOS M5000; Thermo Fisher Scientific, Waltham, MA, USA) under the same conditions. Relative intensity was measured by ImageJ (National Institutes of Health, Bethesda, MD, USA)
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3

Antibody characterization in DNA damage response

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Anti-RTEL1, produced in Rabbit (Sigma, Cat. No. HPA067329); Anti-RPA1, produced in Mouse (Sigma, Cat. No. SAB1406399); Anti-RPA 32 kDa subunit (9H8), produced in Mouse (Santa Cruz Biotechnology, Cat. No. sc-56770); Anti-HA tag (C29F4), produced in Rabbit (Cell Signalling Technology, Cat. No. 3724); Anti-gamma H2A.X (phospho S139) antibody [3F2], produced in mouse (Abcam, Cat. No. ab22551); Anti-beta Actin, produced in Mouse (Abcam, Cat. No. ab8226); Anti-Rabbit IgG, HRP-conjugate (Millipore, Cat. No. 12–348); Anti-Mouse IgG, HRP-conjugate (Cell Signalling Technology, Cat. No. 7076); Anti-Rabbit IgG, Alexa Fluor™ 488-conjugate (Invitrogen, Cat. No. A-11008); Anti-Rabbit IgG, Alexa Fluor™ 594-conjugate (Invitrogen, Cat. No. SA5-10040); Anti-Mouse IgG, Alexa Fluor™ 488-conjugate (Invitrogen, Cat. No. A-11001); Anti-Mouse IgG, Alexa Fluor™ 594-conjugate (Invitrogen, Cat. No. A-11032)
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4

Characterization of SARS-CoV-2 Entry Factors

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The following antibodies were used: rabbit polyclonal anti-ACE2 (#SAB2100025), anti-mouse polyclonal Immunoglobulins (IgG, IgA, IgM) alkaline phosphatase (AP)-conjugate and anti-rabbit IgG AP-conjugate were purchased from Sigma-Aldrich (St. Louis, MO, USA); rabbit polyclonal anti-TMPRSS2 (#PA5-116054), rabbit monoclonal anti-CD147 (#MA5-29060), anti-mouse IgG Alexa Fluor® 488-conjugate, Alexa Fluor® 568 phalloidin (#A12380), and V5 Tag Monoclonal Antibody Alexa Fluor 488-conjugate (#37-7500-A488) were bought from Invitrogen; SARS-CoV/SARS-CoV-2 (COVID-19) spike antibody (#GTX632604) was purchased from GeneTex, while anti-SARS/SARS-CoV-2 Coronavirus Nucleocapsid Antibody (#MA1-7403) was from Thermo Fisher Scientific. SARS-CoV-2 Spike protein S1 (aa 1-674) Recombinant antigen was bought from Merck Millipore (Darmstadt, Germania). All other chemicals were purchased from Sigma-Aldrich.
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