The raw mass spectrometric data of each sample was subjected to a comprehensive search using the MASCOT engine (Matrix Science, London, UK; version 2.2), seamlessly integrated within Proteome Discoverer 1.4 software. This meticulous process enabled both identification and quantitative analysis of the constituent proteins. The resultant spectral data was meticulously aligned against a curated Sus scrofa protein sequence dataset meticulously procured from the Uniprot database. Trypsin was designated as the primary cleavage enzyme, permitting a maximum of two missed cleavages during the analysis. In the initial search, the mass tolerance for the parent ion was conservatively set to 20 ppm, while this tolerance was refined to 5 ppm in the subsequent main search. The mass tolerance for fragment ions was established at 0.1 Da. Carbamidomethylation of cysteine residues was designated as a permanent modification, while oxidation of methionine residues was defined as a variable modification. The stringent criterion for selecting reliable protein identifications was set at a false discovery rate (FDR) of 0.01 or less.

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