UASt regulatory sequences drive expression of Hsap\IQSEC1 cDNA with a pathogenic variant (Thr343Met), tagged at the C-terminal with 3xTag:HA. The ORF is flanked by a pair of FRT sites (FRT5 at the N-terminal, FRT2 at the C-terminal) and a loxP site is present upstream of the UASt sequences.