Loss of NNT driven signal is an indicator of cell division. Movie shows dividing mesoderm cells labelled with NNT (green) while histone is labelled in all cells (red, His2Av-mRFP1). To label the mesoderm, we collected embryos from the cross of His2Av-mRFP1; NNT, Vasa::EGFP x Twi-Gal4.