Figure . PMID content with totals appended to each segment. Those for ChEMBL were downloaded from European PubMed Central (EPMC) via the query (HAS_CHEMBL:y). For BindingDB the list was provided courtesy of Michael Gilson. For GtoPdb the list was downloaded via the PubMed connectivity for the SIDs. The OR union is 73.5K PMIDs (but all three sources also curate a proportion of DOI-only documents) Figure . Chemistry comparison for the three sources with totals appended to each segment, selected and downloaded as PubChem CID lists. The OR total is 2,033,127. Not that the uniqueness in the Venn sectors is just between these three. Overall uniqueness in PubChem as whole is 266K, 49K and 143 for ChEMBL, BindingDB and GtoPdb, respectively Figure . Target comparisons with totals in each segment. These were downloaded as UniProt ID lists selected via the Chemistry Cross-References in UniProt. These include all species but, as expected, human and rodent predominate in each case. The total of human proteins covered by the three is 3745 representing 18% of the UniProt 20,365 proteome.