Literature information in PubChem: associations between PubChem records and scientific articles

Table 1 Summary of depositor-provided cross-references to PubMed articles from PubChem substances and compounds

	Number of cross-references		Number of records involved
	N_SID-PMID	N_CID-PMID	N_PMID	N_SID	N_CID
All	5,614,567	5,412,256	2,192,601	301,358	261,497
IBM Almaden Research Center^a	5,196,617	5,125,878	2,107,354	152,777	147,576
Comparative toxicogenomics database^b	226,585	111,029	110,000	14,463	7856
NIAID ChemDB^c	144,477	133,012	11,951	114,953	104,418
IUPHAR/BPS guide to PHARMACOLOGY^d	14,309	11,250	7163	6398	4913
Human metabolome database^e	13,998	13,971	10,414	1788	1781
Immune epitope database (IEDB)^f	4849	3863	1747	2067	1948
BioCyc^g	3318	3267	1386	2989	2939
DrugBank^h	3249	3225	3158	1044	1030
Biocatalysis/biodegradation database (BBD)ⁱ	2299	2299	644	1343	1342
Bioinformatics and drug design (BIDD) group^j	2270	2262	91	1768	1673
Others	2596	2200	1180	1768	1448

N_SID and N_CID are the number of PubChem substances and compounds with depositor-provided cross-references to PubMed articles, respectively, and N_SID-PMID and N_CID-PMID are the number of depositor-provided cross-references from PubChem substance and compound records to PubMed articles, respectively. N_PMID is the number of unique PubMed articles associated with the PubChem records via the depositor-provided cross-references
^a http://www.research.ibm.com/labs/almaden/index.shtml
^bRef. [15]. http://ctdbase.org
^c http://chemdb.niaid.nih.gov
^dRef. [16]. http://www.guidetopharmacology.org
^eRef. [17]. http://www.hmdb.ca
^fRef. [18]. http://www.iedb.org
^gRef. [19]. http://biocyc.org
^hRef. [20]. http://www.drugbank.ca
ⁱRef. [21]. http://eawag-bbd.ethz.ch
^j http://bidd.nus.edu.sg

ISSN: 1758-2946