. "ubiquitin specific peptidase 21 (USP21) [hgnc:12620]" . . . "ubiquitin specific peptidase 21 (USP21)" . "hgnc:12620" . "USP21" . "http://www.genenames.org/data/hgnc_data.php?hgnc_id=HGNC:12620" . . . "ubiquitin specific peptidase 21" . "Approved" . "gene with protein product" . . "2000-06-08" . "2008-04-11" . "Standard" . . . . . . . . . "AF177758" . "USP" . "2005-08-08" . "USP23" . "'ubiquitin specific protease 21'" .