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1 cyano 4 dimethylaminopyridinium tetrafluoroborate cdap

Manufactured by Merck Group
Sourced in United States

1-cyano-4-dimethylaminopyridinium tetrafluoroborate (CDAP) is a chemical compound used as a reagent in laboratory settings. It is a crystalline solid with a characteristic color. The compound functions as a source of cyanide ions in various chemical reactions and analyses.

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4 protocols using 1 cyano 4 dimethylaminopyridinium tetrafluoroborate cdap

1

Mycobacterial Growth Conditions and Reagents

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M. bovis BCG Pasteur and Mtb H37Rv were grown in minimal medium (MM) [KH2PO4 1 g/l, Na2HPO4 2.5 g/l, asparagine 0.5 g/l, ferric ammonium citrate 50 mg/l, MgSO4×7 H2O 0.5 g/l, CaCl2 0.5 mg/l, ZnSO4 0.1 mg/l, 0.1% (v/v) glycerol, and with or without Tyloxapol 0.05% (v/v; Sigma), pH 7.0] or in Middlebrook 7H9 supplemented with 10% (v/v) OADC enrichment (Becton Dickinson Microbiology Systems, Spark, MD), 0.5% (v/v) glycerol and with or without Tyloxapol 0.05% (v/v) for 14 days in a 5% CO2 incubator at 37°C. Mtb lineages were a gift from Sebastien Gagneux. Mtb lineages were systematically grown in MM supplemented with 30 mM pyruvate.
Recombinant Ag85b was obtained from AERAS Tb vaccine Foundation (Rockville, MD). Recombinant PA (Protective Antigen from Bacillus anthracis) was obtained from David Axelrod Institute, Albany, NY). The 1-cyano-4-dimethylaminopyridinium tetrafluoroborate (CDAP) and the other reagents used during the conjugation reaction were purchased from Sigma. The CS-35 monoclonal antibody recognizing LAM and AM, was obtained from BEI resources (Manassas, VA). The monoclonal antibody 9d8 specifically recognizes mycobacterial capsular AM [10 (link), 54 (link)]. The monoclonal antibody 24c5 specifically recognizes mycobacterial capsular α-glucan [55 (link)]. Alhydrogel was purchased from InvivoGen (San Diego, US).
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2

Glycoconjugate Synthesis and Characterization

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Antigens DHG, SagA, and PpiC were produced and purified as described previously (Supplementary Materials) [8 (link), 11 (link), 12 (link)]. After the purification procedure, rSagA and rPpiC were used for conjugation at 5 mg/mL. DHG was covalently coupled to the proteins as described by Lees et al, using the cyanylating reagent 1-cyano-4-dimethylamino-pyridinium tetrafluoroborate (CDAP; Sigma-Aldrich) at 100 mg/mL in acetonitrile [29 (link)]. A solution of 1 mg of DHG in 100 µL of ultrapure water was slowly mixed with 10 µL of CDAP. After 30 seconds, 15 µL of 0.2 M trimethylamine was added. Final coupling was done by adding 1 mg of protein to the mixture, and the reaction was incubated overnight at room temperature. The glycoconjugates (DHG-SagA and DHG-PpiC) were cleaned up with an Amicon ultrafiltration device with a 100-kDa membrane (Merck-Millipore). The correct conjugation process was assessed by sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot (Supplementary Materials). Sugar and protein content were determined by hexose and Bradford assays to establish the polysaccharide to protein ratio in the glycoconjugates (Supplementary Materials).
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3

NF-κB Pathway Activation Analysis

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Dulbecco's modified Eagle's medium was purchased from Gibco (Grand Island, NY, USA). Fetal bovine serum was from Sijiqing (Hangzhou, Zhejiang, China). Penicillin, streptomycin, and nuclear and cytoplasmic extraction kit were from Shenggong (Shanghai, China). Abs to phospho-IκB-α, IκB-α, NF-κB-p65, β-actin, and JSH-23 were all from Santa Cruz (Santa Cruz, CA, USA). PDTC, MG-132, BAY 11-7082, BCA protein assay kit, nitric-oxide synthase assay kit, and abs to histone H3 were from Beyotime (Nantong, Jiangsu, China). Abs specific to mouse TLR4 was from eBioscience (San Diego, CA, USA). LPS, o-phenylenediamine, fluoresceinamine (FLA), and 1-cyano-4-dimethylaminopyridinium tetrafluoroborate (CDAP) were from Sigma-Aldrich (St. Louis, MO, USA). Enhanced chemiluminescence (ECL) substrate was from Thermo Scientific.
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4

Murine Dendritic Cell Characterization

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YCP was isolated and characterized in our lab previously [21 (link)]. All primary antibodies were purchased from eBioscience (San Diego, CA, USA) and used at concentrations between 1 and 5 μg/mL. 1-Cyano-4-dimethylaminopyridinium tetrafluoroborate (CDAP) was purchased from Sigma Chemical Co. (St. Louis, MO, USA). Recombinant murine IL-4 and recombinant murine GM-CSF were purchased from PeproTech (Rocky Hill, NJ, USA). ELISA kits for measuring murine IFN-γ, IL-4, and IL-12 were purchased from R&D Systems (Minneapolis, MN, USA). Anti-mouse TLR2 (CD282) and anti-mouse TLR4 were purchased from eBioscience (San Diego, CA, USA). Pam3CSK4 was purchased from Santa Cruz (San Cruz, CA, USA). 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT), ophenylenediamine, and fluoresceinamine (FLA) were from Sigma-Aldrich (St. Louis, MO, USA). RNA simple Total RNA Kit was purchased from Tiangen Biotech (Beijing, China). First-Strand cDNA Synthesis Kit was purchased from TransGen Biotech (Beijing, China). SYBR Green was purchased from Applied Biosystems (Foster City, CA, USA). Reagents used for cell culture were purchased from Gibco (Grand Island, NY, USA). All other reagents used in this study were of the highest available quality.
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