Regulatory Factor X Transcription Factors

**Definition:** A family of eukaryotic transcription factors that recognize and bind to a highly-conserved cis-regulatory sequence (X-box) within the promoter region of MHC CLASS II GENES. They contain a conserved winged-helix DNA binding domain and function as homo or heterodimers.

**Tree numbers:** - D12.776.260.950.624 - D12.776.930.977.624

**Synonyms:** - RFX Transcription Factors