Transcription factor essential for the completion of meiosis in oocytes. Grauzone binds to the promoter region of cort via the zf-AD domain and activates cort expression in ovaries. Homodimer; at the zf-AD. Present throughout embryogenesis, in larvae, in ovaries and other tissues of adult females, and in adult males. In ovaries, it is expressed in both follicle cells and nurse cells. Expressed from stage 9 in the germarium. Weakly or not expressed in the oocyte nucleus. Expressed both maternally and zygotically. The N-terminal zf-AD is an atypical treble-clef like zinc binding domain which enables dimerization, and appears not to have any DNA-binding ability. DNA binding is achieved through the zinc fingers at the C-terminus.