title: Letter: intercluster chemistry of protonated and sodiated betaine dimers upon collision induced dissociation and electron induced dissociation.
abstract: The collision induced dissociation and electron induced dissociation spectra of the [2M + H](+) and [2M + Na](+) clusters of the zwitterionic amino acid, betaine (M), have been examined in a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer. Intercluster reactions are observed in the collision induced dissociation spectra of [2M + H](+) and [2M + Na](+) and in the electron induced dissociation spectrum of [2M + H](+).
authors.forename: Linda
authors.initials: L
authors.lastname: Feketeová
authors.forename: George N
authors.initials: GN
authors.lastname: Khairallah
authors.forename: Richard A J
authors.initials: RA
authors.lastname: O'Hair
mesh_terms: D001622:Betaine / Q000737:chemistry*; D019281:Dimerization; D005765:Gastrointestinal Agents / Q000737:chemistry*; D011522:Protons; D012964:Sodium / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry
chemical_list: D005765:Gastrointestinal Agents; D011522:Protons; D001622:Betaine; D012964:Sodium