Angiotensin I, a model decapeptide, was glycosylated and partially hydrolyzed with HCl (6 N, 80 °C, 4 h), aminopeptidase, and carboxypeptidase Y. A single peptide mass map obtained from truncated peptides in the partial acid hydrolysate of angiotensin and its glycosylation product mixture by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry enabled sequencing of angiotensin by a combinatorial procedure. MALDI-TOF and electrospray ionization (ESI) tandem mass spectrometric results indicate that both the N-terminal amino group of aspartic acid and the guanidinium group of the second residue arginine are glycosylated.
|Number of pages||10|
|Journal||Bulletin of the Korean Chemical Society|
|Publication status||Published - 2004 Dec 20|
- ESI MS/MS
- MALDI-TOF MS
- Partial hydrolysis
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