{
  "annotation_id": "d5330f80-1e96-45d2-8273-c6d9e968766a",
  "date_created": "2026-03-02T18:01:00.063000Z",
  "date_modified": "2026-03-02T18:01:00.063000Z",
  "file_hash": "fd6ca39d983ff5f591169957e9382713edfc7dd2524f223b43ebd7d429bc7f79",
  "private": false,
  "record": {
    "abstract": "Theoretical characterizations of the various intermediates in the proton pump\ncycle of the retinal Schiff base in the Halobacterium salinarium have been\nperformed. Contrary to the general belief over the years that the most stable\nintermediate, the M-state, is a non-protonated cis-isomer, we find that the\nM-state is a polarized cis-isomer stabilized due to interactions of the\ndissociating proton with the pi-electrons. The role of proton in the pump cycle\nis found to be profound leading to the stabilization or in certain cases\ndestabilization of the intermediates. We propose the chemical structure of the\nM-state for the first time.",
    "arxiv_id": "physics/0507038",
    "authors": [
      "Ayan Datta",
      "Swapan K. Pati"
    ],
    "categories": [
      "physics.chem-ph"
    ],
    "title": "Proton-Pump Mechanism in Retinal Schiff Base: On the molecular structure   of the M-state",
    "url": "https://arxiv.org/abs/physics/0507038"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d15e4757-709b-4d7c-b918-0a367b67f251",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}