ARNT and diabetes mellitus: In models of type 1 [streptozotocin [STZ]-induced (Graham et al., 2011)] and type 2 (db/db) diabetes, the abundance of ARNT protein (DB/DB, Figure 1A) or mRNA (STZ-induced, Figure 1B) was significantly lower in MVECs from diabetic mice than in those from non-diabetic mice.