Ligand Expo: Scheduled downtime and request for feedback


Ligand Expo ( will be down during the month of January 2023. Requests to this service will return a 410 http error code (“Gone”) and a message to contact RCSB PDB with any questions.

Users can access CCD data in mmCIF format at

Please help us better understand which Ligand Expo features are utilized and should be integrated with by taking this survey.


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