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- W2026103657 abstract "Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry is widely used for the analysis of peptide mixtures such as those resulting from protein digestion. Among several useful peptide matrices, alpha-cyano-4-hydroxycinnamic acid (4-HCCA) appears to be the most popular. This matrix does not generally give matrix-cluster peaks at the mass region covered by enzyme-digested peptides (i.e., m/z above approximately 500). However, when an analyte mixture is very dilute and/or the sample contains a large amount of salts, ion peaks from matrix clusters can be quite intense, compared to peptide peaks. This matrix-cluster interference becomes more pronounced as the amount of analyte decreases. In this paper, a simple scheme for matrix-cluster identification is reported. It is shown that matrix-cluster formation follows a systematic pattern, although the relative intensities of these cluster ions cannot be predicted. Discerning the matrix-cluster peaks from the peptide peaks is found to be critical in analyzing dilute peptide mixtures with both conventional and microspot MALDI-TOF techniques." @default.
- W2026103657 created "2016-06-24" @default.
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- W2026103657 date "2000-01-01" @default.
- W2026103657 modified "2023-10-14" @default.
- W2026103657 title "Discerning matrix-cluster peaks in matrix-assisted laser desorption/ionization time-of-flight mass spectra of dilute peptide mixtures" @default.
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- W2026103657 doi "https://doi.org/10.1016/s1044-0305(99)00126-9" @default.
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