UASt regulatory sequences drive expression of the Hsap\IVD open reading frame, tagged at the C-terminal end with three copies of Tag:HA. The ORF was obtained from the human ORFeome v8.1 collection ( ORF_ID:6146 ) and corresponds to Ensembl transcript ENST00000487418.8. The human ORF is flanked by a pair of incompatible FRT sites (FRT5 and FRT2), which allows for future in vivo exchange of either the promoter or tag sequence.