A dominant negative form of the tkv2 isoform, in which the GS box and kinase domain are deleted, is expressed under the control of UAS regulatory sequences.
Flies expressing tkv2ΔGSK.Scer\UAS under the control of Scer\GAL4A9 have a similar phenotype to flies expressing tkv1ΔGSK.Scer\UAS or tkv1AΔGS.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4A9.