Zinc finger transcription factor

Zinc finger transcription factors or ZF-TFs, are transcription factors composed of a zinc finger-binding domain and any of a variety of transcription-factor effector-domains that exert their modulatory effect in the vicinity of any sequence to which the protein domain binds. Besides the presence of additional domains that regulate their activity, such as the predominantly found KRAB domains, the mechanism by which zinc finger transcription factors activate transcription remains unknown.

Source: Wikipedia — Zinc finger transcription factor (CC BY-SA 4.0)