title: Unequivocal structure assignment of C- versus N-alkylated amino acids using fast atom bombardment/tandem mass spectrometry.
abstract: Structure assignment of the isomeric immonium ions 5 and 6, generated via FAB from N-isobutyl glycine and N-methyl valine, can be achieved by their collision induced dissociation characteristics.
mesh_terms: D000478:Alkylation; D000596:Amino Acids / Q000032:analysis*; D013058:Mass Spectrometry
chemical_list: D000596:Amino Acids