Mass Spectrometry of Arginine-Containing Peptides
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United States of America Patent
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Issued Date -
Jun 12, 2008
app pub date -
Dec 8, 2004
filing date -
Dec 8, 2003
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Abstract
Peptides can be derivatised such that, when ionised and analysed by mass spectrometry, those containing arginine residues give characteristic peak patterns. Peaks corresponding to arginine-containing peptides can therefore be selected from a mass spectrum in order to simplify and improve peptide analysis. Suitable labels give derivatised peptides that have the ability to form both a stabilised ion species ([P]+) and a protonated ion molecular species ([P+H]+) that differ by one average mass unit. A characteristic peak pattern is seen.
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