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Q exactive hf mass spectrometer

Manufactured by Waters Corporation

The Q Exactive HF mass spectrometer is a high-resolution, quadrupole-Orbitrap hybrid mass spectrometer designed for advanced analytical applications. It provides high-quality data and accurate mass measurements for a wide range of analytes.

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2 protocols using q exactive hf mass spectrometer

1

Extracellular Vesicle Proteome Analysis

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EV samples were lysed with 100 µL of 8 M urea. Following protein determination, 10 µg of the protein was reduced with TCEP to a final concentration of 10 mM at room temperature for 30 min. Samples were then alkylated with CAA to a final concentration of 40 mM for 30 min at room temperature. Samples were diluted with 50 mM ammonium bicarbonate buffer to obtain a final urea concentration of <1 M. Samples were digested overnight with Lys-C-Trypsin mix (1:100 enzyme: protein ratio) and trypsin (Promega V5073, USA; 1:50 enzyme: protein ratio). Peptides were desalted on C18 stage tips, vacuum dried and resuspended in 2% acetonitrile, 0.1% TFA. The peptide samples were analyzed in the De Botton Protein Profiling Institute of the Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science. Peptides were loaded onto a Waters ACQ M-Class HSS T3 column (1.8 µm, 75 µm × 250 mm) coupled to a Waters nanoACQUITY UPLC and Q Exactive HF mass spectrometer. Peptides were separated using a 180-min linear gradient of water and acetonitrile.
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2

Glycopeptide Characterization by Mass Spectrometry

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As a comparison, along with the intact glycopeptide analyses with timsTOF Pro MS, we characterized both AGP and influenza samples in parallel using a Q Exactive HF mass spectrometer (Thermo-Fisher, San Jose, CA). The Q Exactive HF mass spectrometer was equipped with a nanoAcquity UPLC system: nanoAcquity NPLC Symmetry C18 trap column and ACQUITY UPLC Peptide BEH C18 analytical column (Waters, Milford, MA) and a Triversa Nanomate source (Advion, Ithaca, NY). The sample separation and elution gradient were implemented the same as those used for timsTOF Pro.
Data for both nonenriched glycopeptides and HILIC-enriched glycopeptides were acquired using data-independent acquisition (DIA) methods. MS1 spectra were acquired at a 30,000 resolution at m/z 400, scan range m/z 350–1800, 1 microscan per spectrum, AGC target of 3e6, maximum injection time 32 ms. For MS2 acquisition, the range of m/z 800–1600 was divided into 50 nonoverlapping windows, each with an isolation width of m/z 16. The resolution was 30,000 at m/z 400, and we acquired 2 microscans per spectrum, AGC target 1e6, maximum injection time 32 ms, and NCE 35. Profile and centroid data were recorded for MS1 and MS2 scans, respectively.
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