Expression of nulloScer\UAS.T:Ivir\HA1, under the regulation of Scer\GAL4mat.αTub67C.T:Hsim\VP16, results in severe embryonic cellularisation defects. Expression of nulloScer\UAS.T:Ivir\HA1, under the regulation of Scer\GAL4mat.αTub67C.T:Hsim\VP16, results in cells that are unable to flatten or constrict their apical surfaces.
Expression of nulloScer\UAS.T:Ivir\HA1 under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16 causes lethality in 87% of embryos and blocks the formation of apical junctions.
Expression of nulloScer\UAS.T:Ivir\HA1, under the regulation of Scer\GAL4mat.αTub67C.T:Hsim\VP16 in an arm043A01 mutant, results in cells that are unable to flatten or constrict their apical surfaces as in nulloScer\UAS.T:Ivir\HA1 (Scer\GAL4mat.αTub67C.T:Hsim\VP16) single mutants.