title: Mass spectrometric differentiation of leucine and isoleucine  in proteins derived from bacteria or cell culture.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001426:Bacterial Proteins; D002478:Cells, Cultured; D003903:Deuterium; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007532:Isoleucine / Q000032:analysis*; D007930:Leucine / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D011506:Proteins
chemical_list: D001426:Bacterial Proteins; D011506:Proteins; D007532:Isoleucine; D003903:Deuterium; D007930:Leucine