CELL-PENETRATING PEPTIDES RESEARCH ATLAS — DATA ATTRIBUTION
Source snapshot date: 2026-11-01

This atlas is an independent interface. It is not an official website of any
dataset author or institution. Source fields are discovery metadata and do not
constitute a clinical, safety, efficacy, or experimental recommendation.

1. CPPSITE3 — CORE RECORD DATA
Repository: https://github.com/raghavagps/CPPsite3
License: MIT (see CPPsite3-LICENSE.txt)
Imported file: cppsite3_main1.csv
Revision: sha256:bac2e83f4f0d4ca95ee3f4d7d4cae65b9446ad1f3c912bc18ff76deedfb3751c
Citation: Bajiya N, Najrin S, Kumar P, Choudhury S, Tomer R, Raghava GPS.
CPPsite3: an updated large repository of experimentally validated
cell-penetrating peptides. Drug Discovery Today. 2025;30(8):104421.
https://doi.org/10.1016/j.drudis.2025.104421

2. POSEIDON — QUANTITATIVE UPTAKE SUPPLEMENT
Repository: https://github.com/MoreiraLAB/poseidon/tree/main/data
License: GNU GPL v3 (see POSEIDON-GPL-3.0.txt)
Revision: git:924c5a658856cf76d600c9bf737e5e8fa26dd9f3
Citation: POSEIDON: Peptidic Objects SEquence-based Interaction with cellular
DOmaiNs: a new database and predictor. Journal of Cheminformatics. 2024.
https://doi.org/10.1186/s13321-024-00810-7

3. CELLPPD — POSITIVE BENCHMARK SUPPLEMENT
Repository: https://github.com/raghavagps/CellPPD
License: MIT repository license (see CellPPD-LICENSE.txt)
Revision: git:4708e09d5a28cc9d843b3bf70c7d1ec93e79d881
Citation: Gautam A et al. In silico approaches for designing and predicting
highly effective cell penetrating peptides. Journal of Translational Medicine.
2013;11:74. https://doi.org/10.1186/1479-5876-11-74

Only files labelled positive are imported. Randomly generated, sampled, and
experimental negative files are excluded.

4. CELLPPD-MOD — MODIFIED-PEPTIDE POSITIVE SUPPLEMENT
Repository: https://github.com/raghavagps/CellPPD-Mod
License: MIT repository license (see CellPPD-Mod-LICENSE.txt)
Revision: git:bed0203f3ae71eb733d8021aac6b60caf6394566
Citation: Kumar V et al. Prediction of Cell-Penetrating Potential of Modified
Peptides Containing Natural and Chemically Modified Residues. Frontiers in
Microbiology. 2018;9:725. https://doi.org/10.3389/fmicb.2018.00725

Only positive training and validation sequence files are imported. Negative
files are excluded.

MERGE POLICY
- Sequence strings are trimmed and compared after formatting whitespace is
  removed.
- Letter case, punctuation, and modification notation are retained because
  lowercase letters can encode D-amino acids or other modified residues.
- A supplemental row is added only when its exact normalized string is absent
  from the core and earlier supplements.
- Source memberships remain visible in each record.
- The project does not claim chemical-structure deduplication or universal
  completeness.