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README.md

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----
-viewer: true
-license: cc-by-4.0
-configs:
-  - config_name: cullpdb_pc15.0_res0.0-1.0_len40-10000_R0.2_Xray_d2026_01_26_chains281
-    data_files:
-      - split: train
-        path: curated_csv/subsets/cullpdb_pc15.0_res0.0-1.0_len40-10000_R0.2_Xray_d2026_01_26_chains281.csv
-task_categories:
-  - other
-tags:
-  - biology
-  - protein
-  - structure
-  - PDB
-  - PISCES
-  - CullPDB
-  - sequence
-  - curation
-language: en
-size_categories:
-  - "n>1M"
----
-# PISCES-CulledPDB
-
-Curated protein chain tables from PISCES/CullPDB: one row per chain with sequence and metadata.
-
-**Dataset:** [PRMegathon26/PISCES-CulledPDB](https://huggingface.co/datasets/PRMegathon26/PISCES-CulledPDB)
-
-Use the **subset dropdown** in the Hugging Face Data Viewer to switch between the main table and 242 curation subsets.
-
-## Summary
-
-| Item | Description |
-|------|-------------|
-| **Main CSV** | `curated_csv/cullpdb_combined_chains.csv` — full chain table |
-| **Subsets** | `curated_csv/subsets/*.csv` — 242 files (same columns) |
-| **Index** | `curated_csv/cullpdb_list_fasta_index.csv` |
-
-Full list of subset paths: `curated_csv/dataset_metadata.json` (keys `data_paths`, `subset_paths`).
-
-## Columns (chain CSVs)
-
-| Column | Description |
-|--------|-------------|
-| **pdb_chain** | PDB chain ID (e.g. 1ABC_A) |
-| **pdb** | PDB ID (first 4 chars) |
-| **chain** | Chain ID |
-| **sequence** | Amino acid sequence (one-letter) |
-| **len** | Sequence length |
-| **method** | Experimental method (e.g. XRAY, NMR) |
-| **resolution** | Resolution in Å (per structure) |
-| **rfac** | R-factor |
-| **freerfac** | Free R-factor |
-| **pc** | Sequence identity cutoff % used for this subset |
-| **no_breaks** | Whether chain has no breaks (yes/no) |
-| **R** | R-factor cutoff used for this subset |
-| **source_list** | Subset list basename (identifies curation parameters) |
-
-## Usage
-
-```python
-from huggingface_hub import hf_hub_download
-import pandas as pd
-
-path = hf_hub_download(repo_id="PRMegathon26/PISCES-CulledPDB", filename="curated_csv/cullpdb_combined_chains.csv", repo_type="dataset")
-df = pd.read_csv(path)
-```
-
-## License
-
-cc-by-4.0