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Horseradish peroxidase hrp linked secondary antibody

Manufactured by GE Healthcare
Sourced in United States

The Horseradish peroxidase- (HRP-) linked secondary antibody is a laboratory reagent used in various immunoassay techniques. It consists of a secondary antibody conjugated with the enzyme horseradish peroxidase. This enzyme can catalyze the conversion of a substrate into a colored or luminescent product, allowing for the detection and quantification of target analytes in a sample.

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6 protocols using horseradish peroxidase hrp linked secondary antibody

1

Western Blot Analysis of CD34 Protein

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Skin biopsies were subjected to total protein extraction, and 20 μg was used for SDS-PAGE and transferred to an immobilon-P membrane (Millipore®). The membrane was blocked with 5% nonfat dry milk in 1 TBS (20 mmol/L Tris–HCl, pH 7.5, 150 mmol/L NaCl, and 0.5% Tween-20) for 1 h, blotted with an anti-CD34 (1 : 2000) primary antibody overnight, and then incubated with a horseradish peroxidase- (HRP-) linked secondary antibody (GE Healthcare®) for 1 h. The membranes were developed using the Millipore Immobilon Western Chemiluminescent HRP Substrate according to the manufacturer's instructions. Chemiluminescence was detected using a FujiFilm LAS-3000 imaging system.
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2

Quantitative Protein Analysis via Western Blot and Mass Spectrometry

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Total supernatant was separated on a 12.5% SDS polyacrylamide gel, and blotted onto Amersham Protran Premium 0.45 NC (GE Healthcare Life Sciences). The membrane was blocked overnight at 4°C in Tris-buffered saline (TBS) containing 0.05% Tween 20 (TBS-T, Sigma-Aldrich) and 5% non-fat dry milk (AppliChem). After washing with 0.05% TBS-T, the membrane was incubated with a polyclonal rabbit anti-TTR antibody (S2 Table) diluted 1:500 and incubated for two hours at room temperature. Horseradish peroxidase (HRP)-linked secondary antibody was used (GE Healthcare Life Sciences). Amersham ECL Western Blotting Detection Reagent (GE Healthcare Life Sciences) was added. Blots were quantified using ImageJ 1.48v analysis software. TTR of cell culture supernatants was analyzed using liquid chromatography-high resolution accurate mass MS (LC-HRAM MS) in positive-ion mode.
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3

Western Blot Analysis of C5AR1 Protein

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The proteins extracted from the cell samples were separated on a 4%-12% Bis-Tris NuPAGE gel and transferred onto a polyvinylidene difluoride membrane using a Trans-blot SD semidry transfer cell (Bio-Rad, Hercules, CA, USA). The membranes were blocked with 5% nonfat milk for 1 h at room temperature and incubated with primary C5AR1 antibody (1 : 100; Santa Cruz Biotechnology) overnight, followed by horseradish peroxidase- (HRP-) linked secondary antibody (1 : 5000; GE Healthcare, Piscataway, NJ, USA). Signal detection was performed with the ECL-Plus western blotting reagent kit (GE Healthcare).
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4

Protein extraction and Western blot analysis

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Cells were lysed using RIPA buffer (Sigma‐Aldrich) supplemented with the Protease and Phosphatase Inhibitor Single‐Use Cocktail (1% (v/v), Gibco/Thermo Fisher Scientific) on ice for 15 min. Then the samples were centrifuged at 14 000g for 15 min at 4 °C to collect the supernatant. After that, soluble protein samples were denatured at 95°C with the laemmli buffer (Biorad, Hercules, CA, United States) containing 10% (v/v) β‐mercaptoethanol (Biorad). The protein samples were fractionated electrophoretically on NuPAGE™ 4%–12% Bis‐Tris Gel (Invitrogen), and then transferred to membranes by the semi‐dry (Invitrogen) or wet transfer method (BioRads). After being blocked with 3% non‐fat milk (BioRad), membrane was incubated with primary antibodies overnight at 4 °C on a shaker. Antibody information is provided in Table S2. Following incubation with horseradish peroxidase (HRP)‐linked secondary antibodies (GE Healthcare Life Sciences, Malborough, MA, USA), the membranes were incubated with SuperSignal West Dura Extended Duration Substrate (Thermo Fisher Scientific) and imaged with ChemiDocTMTouch Imaging system (BioRad). Image J was utilized to semi‐quantify the blot images.
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5

Western Blot Analysis of Signaling Pathways

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Samples were homogenized in RIPA buffer (Sigma) and supplemented with protease and phosphatase inhibitors (ThermoFisher). Proteins were fractionated electrophoretically on NuPAGE™ 4–12% Bis-Tris Gel (Invitrogen) and then transferred to a polyvinylidene fluoride (PVDF) membrane using the iBlot Dry Blotting System (Invitrogen). Primary antibodies directed against glyceraldehyde-3-phosphate dehydrogenase (GAPDH), total Erk1/2, phosphorylated Erk1/2 (P-Erk1/2), β-catenin, p38, phosphorylated p38 (P-p38), Smad1, phosphorylated Smad1/5 (P-Smad1/5), Runx2, Smad2/3, phosphorylated Smad2/3 (P-Smad2/3), were purchased from Cell Signaling Technology (Danvers, MA, USA). Antibodies against phosphorylated Smad2 (P-Smad2) were purchased from ThermoFisher company. Bound primary antibodies were detected using horseradish peroxidase (HRP)-linked secondary antibodies (GE Healthcare Life Sciences, Malborough, MA, USA) and SuperSignal West Dura Extended Duration Substrate (ThermoFisher). Images were acquired by ChemiDocTM Touch Imaging System (BIO-RAD, Hercules, CA, USA) and quantified with the NIH Image-J software.
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6

Validating BRI2 Interactions via Immunoblotting

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In order to validate BRI2 interactions, immunobloting assays were carried out. Brain lysates and eluted proteins from the co-immunoprecipitation assays performed in rat cortex tissue were resolved on 5–20% gradient SDS-PAGE and electrophoretically transferred onto nitrocellulose membranes. Moreover, additional co-immunoprecipitations were performed as described above, using a mouse anti-PSD-95 antibody (1 µg/100 µg protein; Cat. No. MAB1598; Millipore), a mouse anti-synaptophysin (5 µg/IP; Cat. No. 101011; Synaptic Systems) and a rabbit anti-GAP-43 antibody (1 µg/100 µg protein; Cat. No. 442695; Calbiochem).
Nonspecific protein-binding sites were blocked using 5% nonfat dry milk in TBST. Afterward, the membranes were incubated with the following primary antibodies: anti-BRI2 antibody (catalog no.: sc-374362, Santa Cruz Biotechnology) and anti-PSD95 (catalog no.: ab9708, Merck Millipore) overnight at 4 °C with shaking. The membranes were then washed three times for 10 minutes with TBST and incubated for 2 h at room temperature with horseradish peroxidase (HRP)-linked secondary antibodies (GE Healthcare). Finally, the membranes were washed three times for 10 minutes with TBST and enhanced chemiluminescence-based system were used for protein detection.
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