{
  "id": 2012386,
  "title": "Threonine nitrogen isotopes reveal hidden physiological dimensions of mammalian ecology",
  "url": "https://urgent.news/2026/08/19/threonine-nitrogen-isotopes-reveal-hidden-physiological-dimensions-of",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-19T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.14.744972v1?rss=1"
  },
  "original_language": "en",
  "account": null,
  "summary": "Stable nitrogen isotopes of amino acids are widely used to reconstruct trophic position. Most applications rely on only two amino acids despite routinely measuring many others. Here, comparative amino acid {delta}15N values from 88 mammal species reveal that threonine records a physiological dimension beyond trophic position. Adding threonine to the canonical glutamate-phenylalanine framework…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}