title: An approach to the differentiation of leucine and isoleucine residues in EI mass spectra of peptides(1).
mesh_terms: D004583:Electrons; D007532:Isoleucine / Q000032:analysis*; D007930:Leucine / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D010455:Peptides
chemical_list: D010455:Peptides; D007532:Isoleucine; D007930:Leucine