# Source attribution

- SimpleFold: Wang et al., *SimpleFold: Folding Proteins is Simpler than You Think*.
  [Paper](https://arxiv.org/abs/2509.18480),
  [official code and target lists](https://github.com/apple-aiml-research/ml-simplefold).
  Author target lists are identified by retrieval URL and SHA-256 in the source
  ledger. Apple's software MIT license is not asserted to replace data licenses.
- AFESM: Yeo et al., *Metagenomic-scale analysis of the predicted protein structure universe*.
  [Cluster resource](https://afesm.foldseek.com/),
  [analysis repository](https://github.com/steineggerlab/afesm-analysis).
- AlphaFold Protein Structure Database: Jumper et al. and Varadi et al.
  [AFDB](https://alphafold.ebi.ac.uk/). Downloaded AFDB structure headers specify
  CC BY 4.0. Keep original attribution with redistributed coordinates.
- ESM Metagenomic Atlas: Lin et al., *Evolutionary-scale prediction of atomic-level
  protein structure with a language model*.
  [Source and license](https://github.com/facebookresearch/esm#license).
  Atlas data are CC BY 4.0; copyright Meta Platforms, Inc.
- Protein Data Bank: [wwPDB](https://www.wwpdb.org/).
  Each derived chain record will retain its PDB accession, chain identity,
  initial release date, source locator, and coordinate hash.

The repository uses source-specific data licenses. Dataset preparation does not
transfer authorship of the original structures or predictions.

- AFDB bulk mirror: [timodonnell/afdb-1.6M](https://huggingface.co/datasets/timodonnell/afdb-1.6M), derived from AFDB-24M, pinned revision `a7ededeb7caeaef3892f40f2e4df3bb9236b02f8`. Source coordinates are AFDB v4, CC BY 4.0; source structural cluster labels originate from the Steinegger lab AFDB clustering.