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3 protocols using irdye 680lt goat anti rat igg

1

Western Blot Analysis of P. falciparum

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Schizonts were released from erythrocytes by the addition of phosphate-buffered saline (PBS) containing 0.15% (wt/vol) saponin and protease inhibitors (cOmplete EDTA-free; Sigma) for 3 min on ice. Saponin lysates were solubilized with 3× sample buffer with 5% beta-mercaptoethanol at a concentration of 1.6 × 109 parasites/ml. Parasite extracts were subjected to SDS-PAGE and transferred to a nitrocellulose membrane. Membranes were immunostained with rat antihemagglutinin (anti-HA) (1:1,000 dilution; Roche) and rabbit anti-P. falciparum EBA175 (anti-PfEBA175) (1:2,000 dilution; a kind gift from Christine R. Collins), followed by IRDye 680LT goat anti-rat IgG (1:10,000 dilution; LI-COR) and IRDye 800CW goat anti-rabbit IgG (1:10,000 dilution; LI-COR). The signals were detected by a fluorescence imager (Odyssey CLx; LI-COR).
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2

Western Blot Analysis of Parasite Proteins

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Parasite extracts were solubilized in protein loading buffer, denatured at 95°C for 10 min, subjected to SDS-PAGE, and transferred onto a nitrocellulose membrane. Membranes were immunostained with mouse anti-GFP (1:250 dilution; Roche, 11814460001), rabbit anti-Aldolase-horseradish peroxidase (HRP) conjugated (1:5,000 dilution; Abcam ab38905), and rabbit anti-histone 3 (1:2,000 dilution; Abcam ab1791) primary antibodies. Antibody detection was done using chemiluminescent Western blotting using goat anti-mouse secondary antibody conjugated with HRP and the ECL Western blotting detection reagents (Amersham RPN2106) or by direct infrared fluorescence detection on the Odyssey Infrared Imaging System (Odyssey CLx, LI-COR) using IRDye 680LT goat anti-rat IgG (1:10,000 dilution; LI-COR) and IRDye 800CW goat anti-rabbit IgG (1:10,000 dilution; LI-COR).
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3

Western Blot Analysis of Lung Tissue

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P22 lung tissues were collected in RIPA buffer supplemented with Complete Protease Inhibitor Cocktail tablets (Roche) and PhosSTOP Phosphatase Inhibitor Cocktail tablets (Roche). Protein samples were then homogenized in a QIAGEN TissueLyser II. Protein concentrations were measured by Pierce™ BCA Protein Assay kit (Thermo Scientific).
An estimated ~10ug protein sample was loaded in each well and ran on a 4%–12% SDS-PAGE gel (Invitrogen), followed by transfer to PVDF membranes. PVDF membranes were blocked in TBST (0.1% Tween-20) with 5% BSA for 1.5 hours, incubated in primary antibodies overnight, and then incubated in the secondary antibody for 1 hour. All imaging and quantification were performed using the Image Studio Lite software system (LI-COR Biosciences). The following primary antibodies were used: CLDN5 (Invitrogen, 4C3C2, 1:2000), CDH5 (BD, 11D4.1, 1:1500) and β-actin (Novus Biologicals, NB600501, 1:5000). The secondary antibody used were: IRDye 680RD donkey anti–mouse IgG (LI-COR, 925–69072, 1:10,000) and IRDye 680LT goat anti-rat IgG (LI-COR, 925–68029, 1:10,000). Three biological replicates were performed for each antibody.
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