Binds to a number of sites in the transcriptional regulatory region of ftz. Isoform alpha is required to repress genes that promote the R7 cell fate. Probable repressor of the transcription of the segmentation genes ftz, eve, h, odd, run, and en. May bind to the region 5'-AGGG[CT]GG-3'. Degradation of ttk is directed by binding of sinah or sina, via the adapter molecule phyl which binds to the BTB domain of ttk. Interacts with CoRest/CG33525, suggesting that it acts by recruiting a CoRest-containing corepressor complex. Interacts with phyl. Expressed both maternally and zygotically. Expressed in preblastoderm embryos, followed by complete decay upon formation of the cellular blastoderm when ftz striped expression is at its peak. It is uncertain whether Met-1 or Met-3 is the initiator. Truncated N-terminus.