title: Emission spectrometric analysis of 15N.
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D001322:Autoanalysis; D006801:Humans; D013058:Mass Spectrometry; D009584:Nitrogen / Q000097:blood; D009587:Nitrogen Isotopes / Q000032:analysis*; D011506:Proteins / Q000378:metabolism; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: D000596:Amino Acids; D009587:Nitrogen Isotopes; D011506:Proteins; D009584:Nitrogen