DENN (after differentially expressed in neoplastic vs normal cells) is a domain which occurs in several proteins involved in Rab- mediated processes or regulation of MAPK signalling pathways [1].

1: uDENN, DENN, and dDENN: indissociable domains in Rab and MAP kinases signaling pathways. Levivier E, Goud B, Souchet M, Calmels TP, Mornon JP, Callebaut I; Biochem Biophys Res Commun 2001;287:688-695. PMID:11563850