UAS regulatory sequences drive expression of a chimeric protein that includes the N-terminal region of Hsap\WIF1 (amino acids 1-37), the WIF domain of shf (amino acids 119-261) and the C-terminal region of Hsap\WIF1 containing the 5 EGF motifs (amino acids 178-379). The protein is tagged at the C-terminal end with Tag:HA.