Nitrogen-13 as a biochemical tracer.
D000596:Amino Acids / Q000378:metabolism; D000641:Ammonia / Q000378:metabolism; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D000458:Cyanobacteria / Q000378:metabolism; D006801:Humans; D009566:Nitrates / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D009585:Nitrogen Dioxide / Q000378:metabolism; D009586:Nitrogen Fixation; D009587:Nitrogen Isotopes; D009603:Nitroso Compounds / Q000378:metabolism; D009609:Nitrous Oxide / Q000378:metabolism; D013025:Glycine max / Q000378:metabolism
D000596:Amino Acids; D009566:Nitrates; D009573:Nitrites; D009587:Nitrogen Isotopes; D009603:Nitroso Compounds; D000641:Ammonia; D009609:Nitrous Oxide; D009584:Nitrogen; D009585:Nitrogen Dioxide