WikiCell, as a portal for a unified view of the human transcriptome. At present, WikiCell consists of Expressed Sequenced Tags, and users may browse, query, upload and download sequences. Researchers can utilize transcriptome model based upon a human taxonomy graph. Sequences in each model are sorted by attributes such as physiological and pathological samples. The Genbank EST data format is conserved and gene information, including, HK, location and GO description, are provided. We believe that WikiCell provides a useful resource for transcriptome research and it may be accessed at http://www.wikicell.org/.