ST-0000047 17/Smith-Magenis Sx E3 Gene: LLGL/HUGL Interval: Promoter –Exon 1 [dpsc_display_product] Written by: Peter Rogan on August 25, 2009.on May 18, 2011. Posted in and tagged 17/Smith-Magenis Sx E3 Gene: LLGL/HUGL.