The sequence between the NcoI site at position 295 to the EcoRV site at position 804, amino acids 1 to 171, (including the destruction box) is replaced by the Tag:HA epitope.
egg chamber & cell
egg chamber & mitotic cell cycle
Expression of homozygous CycAΔ.T:Ivir\HA1 at the permissive temperature prevents or severely delays cell cycle progression at metaphase.
When CycAΔ.T:Ivir\HA1 is over-expressed in adult females germline cysts with an aberrant number of cells are produced. Five days after heat-shock treatment cysts containing 32 instead of 16 cells are seen in 17% of egg chambers. The oocyte contains 5 ring canals (as compared to 4 in wild-type). Very rarely, cysts with an intermediate number of cells (in between 16 and 32) are seen. Abnormally large fusomes are also seen.
Expression delays cell cycle progression after entry into mitosis, predominantly metaphase figures are seen.
CycAΔ.Tag:HA has phenotype, suppressible by bamΔ86