Text resources.

We obtained text from abstracts relevant to human genes from PubMed on December 2006. In the first row we list the number of human genes with any references listed, the total number of abstracts referencing them, and the total number of gene references. We then list the mean and median number of abstract references per gene, and also the mean and median number of gene references per abstract. We used Homologene to identify human gene orthologs, and obtained text for those genes; information about those genes and references is listed in the second row. We combined the two pools of gene references to create a large combined database of 18,875 genes with 599,537 references to 259,638 articles, described in the third row.