UASt regulatory sequences drive expression of the iPLA2-VIA PB isoform (sequence amplified from the RE23733 cDNA), in which the catalytic Ser residue has been mutated to Ala; this has previously been shown to abrogate catalytic activity. The coding sequence is tagged at the C-terminal end with three copies of Tag:HA.
Scer\GAL4Tub.PU/iPLA2-VIASA.UAS.PB.Tag:HA partially rescues iPLA2-VIAΔ23