ST-0000028 15/Prader-Willi, Angelman & Duplication Sx E3 Gene: SNRPN Interval: Promoter Written by: Peter Rogan on August 25, 2009.Last revised by: May 17, 2011. Posted in and tagged 15/Prader-Willi, Angelman & Duplication Sx E3 Gene: SNRPN.