Amino acid replacement: R516A.
UASt regulatory sequences drive expression of a form of tok, in which the pro-domain processing site has been mutated.
tokpm.UAS.Tag:HA/Scer\GAL4da.G32 fails to rescue tokΔ2-41/tokE1
Scer\GAL4elav-C155/tokpm.UAS.Tag:HA fails to rescue tokΔ2-41/tokE1