|  | Homeo domain factors | 
|  | C2H2 zinc finger factors | 
|  | Runt domain factors | 
|  |  | 
|  | Basic leucine zipper factors (bZIP) | 
|  | High-mobility group (HMG) domain factors | 
|  | SAND domain factors | 
|  | Rel homology region (RHR) factors | 
|  | DM-type intertwined zinc finger factors | 
|  | Nuclear receptors with C4 zinc fingers | 
|  | Tryptophan cluster factors | 
|  | Fork head / winged helix factors | 
|  | GCM domain factors | 
|  | Grainyhead domain factors | 
|  | Zipper-type | 
|  | Heat shock factors | 
|  | SMAD/NF-1 DNA-binding domain factors | 
|  | Other C4 zinc finger-type factors | 
|  | Paired box factors | 
|  | TEA domain factors | 
|  | STAT domain factors | 
|  | Basic helix-loop-helix factors (bHLH) |