{
  "annotation_id": "fc2f4529-c4e5-4567-8f2e-179b1067f461",
  "date_created": "2026-03-02T18:01:31.870000Z",
  "date_modified": "2026-03-02T18:01:31.870000Z",
  "file_hash": "04f81eb9015f177a0bd323bc54560fa741aaa3da198193664868425293ead982",
  "private": false,
  "record": {
    "abstract": "Changing base composition during the evolution of biological sequences can\nmislead some of the phylogenetic inference techniques in current use. However,\ndetecting whether such a process has occurred may be difficult, since\nconvergent evolution may lead to similar base frequencies emerging from\ndifferent lineages.\n  To study this situation, algebraic models of biological sequence evolution\nare introduced in which the base composition is fixed throughout evolution.\nBasic properties of the associated algebraic varieties are investigated,\nincluding the construction of some phylogenetic invariants.",
    "arxiv_id": "q-bio/0407035",
    "authors": [
      "Elizabeth S. Allman",
      "John A. Rhodes"
    ],
    "categories": [
      "q-bio.PE",
      "math.AG"
    ],
    "title": "Phylogenetic invariants for stationary base composition",
    "url": "https://arxiv.org/abs/q-bio/0407035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f44472b2-8955-4bd1-8abf-ff36ade9a6f0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}