887bp HindIII-NarI fragment of a partial ovarian Cf2 cDNA containing 247bp of 5' UTR and 640bp of the 5' portion of the coding region is cloned in the reversed orientation downstream of the Hsp70 promoter.
Overexpression of P{CF2-s} causes moderate dorsalisation of egg chambers; egg chambers are rounded in appearance, appendages are enlarged and fused and follicle cell count is reduced.