sgg minigene; the NB10 sgg cDNA is fused downstream of a 1.9kb genomic fragment from the sgg locus that is located just upstream of the most 5' exon of the cDNA.
In an otherwise null background, sggmR10 and sggmR39 together allow development to viable adults, while sggmR10 alone allows development to pharate adults, and this is not improved by the addition of sggmR46.