{
  "annotation_id": "c8bab91a-f1d3-423d-b7e0-1d96aeeee424",
  "date_created": "2026-03-02T18:01:31.922000Z",
  "date_modified": "2026-03-02T18:01:31.922000Z",
  "file_hash": "c33648fd72c595ae2aa131e836254b00a616cb46345d806a4ec4076f2bd73ac9",
  "private": false,
  "record": {
    "abstract": "The vibrational dynamics of a DNA molecule with counterions neutralizing the\ncharged phosphate groups have been studied. With the help of elaborated model\nthe conformational vibrations of the DNA double helix with alkaline metal ions\nhave been described both qualitatively and quantitatively. For the complexes of\nDNA with counterions Li+, Na+, K+, Rb+ and Cs+ the normal modes have been\nfound, and a mode characterized by the most notable ion displacements with\nrespect to the DNA backbone has been determined. The frequency of counterion\nvibrations has been established to decrease as the ion mass increases. The\nresults of theoretical calculation have been showed to be in good agreement\nwith the experimental data of Raman spectroscopy.",
    "arxiv_id": "q-bio/0412022",
    "authors": [
      "S. M. Perepelytsya",
      "S. N. Volkov"
    ],
    "categories": [
      "q-bio.BM"
    ],
    "journal_ref": "S. M. Perepelytsya, S. N. Volkov, Ukr. J. Phys. 49, 1072 (2004)",
    "title": "Ion-Phosphate Mode in the DNA Low-Frequency Spectra",
    "url": "https://arxiv.org/abs/q-bio/0412022"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "96ec2030-a1b4-4c9f-a985-71a05dfb6ff0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}