Ligand Expo

Ligand Expo is down from January 1-31, 2023. Requests to this service will return a 410 http error code (“Gone”). Please help us better understand which Ligand Expo features are utilized and should be integrated with RCSB.org by taking this survey.

Users can access CCD data in mmCIF format at https://files.wwpdb.org/pub/pdb/refdata/chem_comp/. For other data download during server downtime, please contact chenghua.shao@rcsb.org.