UASt regulatory sequences drive expression of a truncated form of Lar (composed of Lar amino acid residues 33-1406, an SL dipeptide (which does not interfere with Lar function) and Lar amino acid residues 1409-1470), lacking both phosphatase domains. The protein is tagged with Tag:SS(wg) and three copies of the Tag:HA at the N-terminus.