There are three members of the ADAR family, ADARs 1-3, with ADAR 1 and ADAR 2 being the only enzymatically inactive members and widely expressed in tissues, and ADAR3 is thought to have a regulatory role in the brain and is restricted to the brain only.
There are three members of the ADAR family ADARs 1-3 with ADAR1 and ADAR2 being the only enzymatically active members. 
