title: Photodissociation of singly protonated peptides at 193 nm investigated with tandem time-of-flight mass spectrometry.
abstract: Photodissociation at 193 nm of some singly protonated peptides generated by matrix-assisted laser desorption/ionization was investigated using tandem time-of-flight mass spectrometry. For peptides with arginine at the C-terminus, x, upsilon, and w fragment ions were generated preferentially while a and d fragment ions dominated for peptides with arginine at the N-terminus. These are the same characteristics as photodissociation at 157 nm reported previously. Overall, the photodissociation spectra obtained at 157 and 193 nm were strikingly similar.
authors.affiliation: National Creative Research Initiative Center for Control of Reaction Dynamics and School of Chemistry, Seoul National University, Seoul 151-742, Korea.
authors.forename: Jeong Hee
authors.initials: JH
authors.lastname: Moon
authors.forename: So Hee
authors.initials: SH
authors.lastname: Yoon
authors.forename: Myung Soo
authors.initials: MS
authors.lastname: Kim
mesh_terms: D000595:Amino Acid Sequence; D000804:Angiotensin II / Q000737:chemistry; D001120:Arginine / Q000737:chemistry; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry*; D010777:Photochemistry; D011522:Protons
chemical_list: D010455:Peptides; D011522:Protons; D000804:Angiotensin II; D001120:Arginine