Color | TF Class | Number
--- | --- | ---
| Homeo domain factors | 1
| C2H2 zinc finger factors | 2
| Basic helix-loop-helix factors (bHLH) | 3
| Basic leucine zipper factors (bZIP) | 4
| Nuclear receptors with C4 zinc fingers | 5
| Fork head/winged helix factors | 6
| High-mobility group (HMG) domain factors | 7
| Tryptophan cluster factors | 8
| Paired box factors | 9
| Other C4 zinc finger-type factors | 10
| Rel homology region (RHR) factors | 11
| T-Box factors | 12
| DM-type intertwined zinc finger factors | 13
| Runt domain factors | 14
| GCM domain factors | 15
| Grainyhead domain factors | 16
| SMAD/NF-1 DNA-binding domain factors | 17
| ARID | 18
| Basic helix-span-helix factors (bHSH) | 19
| Heat shock factors | 20
| MADS box factors | 21
| SAND domain factors | 22
| STAT domain factors | 23
| TATA-binding proteins | 24
| TEA domain factors | 25
| Zipper-type | 26
| Unknown | 27
* | Unvalidated