- Protein modification CC-BY-4.0
Protein modification project contributors; CC-BY-4.0; https://raw.githubusercontent.com/HUPO-PSI/psi-mod-CV/7199e3d7ff1398db65ca3fc3443e7b406451211f/LICENSE; https://obofoundry.org/ontology/mod.html
http://purl.obolibrary.org/obo/MOD_01661 ; https://purl.obolibrary.org/obo/mod.owl ; snapshot SHA-256 35e1a1e7f1802c5d700e5bfc3804b5346c618243f85f76ff13264367e66c6da3 ; exact-byte upstream commit 7199e3d7ff1398db65ca3fc3443e7b406451211f ; license https://raw.githubusercontent.com/HUPO-PSI/psi-mod-CV/7199e3d7ff1398db65ca3fc3443e7b406451211f/LICENSE ; license evidence checked 2026-11-08