{
  "databaseVersion": "v1.4.0",
  "lastUpdated": "2026-05-28",
  "status": "Current release",
  "summary": "Updated the TCR Cross-Reactive pMHCs dataset from TCR_CrossReactive_pMHCs.v1.4.0.xlsx and archived the previous TCR release for reproducible downloads.",
  "datasets": [
    {
      "key": "TCR",
      "name": "TCR Cross-Reactive pMHCs Dataset",
      "version": "v1.4.0",
      "lastUpdated": "2026-05-28",
      "file": "TCR_CrossReactive_pMHCs.v1.4.0.json",
      "records": 21189,
      "groups": 1514,
      "description": "Records where a single TCR recognizes multiple distinct pMHC ligands."
    },
    {
      "key": "pMHC",
      "name": "pMHC Cross-Reactive TCRs Dataset",
      "version": "v1.3.0",
      "lastUpdated": "2025-12-13",
      "file": "pMHC_CrossReactive_TCRs.json",
      "records": 26393,
      "groups": 511,
      "description": "Cases where a given pMHC complex is recognized by multiple distinct TCRs."
    }
  ],
  "history": [
    {
      "version": "v1.4.0",
      "date": "2026-05-28",
      "description": "Updated TCR_CrossReactive_pMHCs from TCR_CrossReactive_pMHCs.v1.4.0.xlsx; archived the previous v1.3.0 TCR XLSX and JSON files for download."
    },
    {
      "version": "v1.3.0",
      "date": "2025-12-13",
      "description": "Added a dedicated dataset version module, server-side dataset API, and explicit record/group counts for both CROSSTCR datasets."
    },
    {
      "version": "v1.2.0",
      "date": "2025-06-10",
      "description": "Added JSON download for pMHC_CrossReactive_TCRs and refined metadata fields for selected TCR sequence records."
    },
    {
      "version": "v1.1.0",
      "date": "2025-04-22",
      "description": "Updated TCR_CrossReactive_pMHCs with the latest curated experimental cross-reactivity records."
    },
    {
      "version": "v1.0.0",
      "date": "2024-12-05",
      "description": "Initial public release of the CROSSTCR cross-reactivity datasets."
    }
  ]
}