Genes encoding the visual system Reduced ocelli (Rdo) protein60 (Fig. 2i), the exchange factor for the GTPase Arf-6 (Efa6)61, and the synaptic adhesion molecule Neuroligin 3 (Nlg3)62 (Fig. 2j), show dynamic expression patterns in the cyst cells. Here, ARF6 is linked to cyst.