Transcription factors (TFs) of Synaphobranchus kaupii are usually classified into different families according to their conserved DBDs, which was based on the rule of AnimalTFDB 4.0.
| ZBTB(185) | zf-MIZ(8) | Homeobox(269) | Fork_head(70) | zf-C2H2(497) |
| bHLH(161) | CUT(11) | GCFC(3) | T-box(26) | PAX(14) |
| ARID(24) | HMG(68) | zf-BED(18) | PC4(2) | TEA(6) |
| DM(7) | SRF(10) | MYB(36) | MH1(19) | RFX(11) |
| HTH(36) | THAP(48) | E2F(10) | ETS(40) | Tub(6) |
| IRF(14) | CTF_NFI(7) | RHD(14) | zf-NF-X1(2) | Pou(22) |
| NDT80_PhoG(2) | zf-GATA(17) | zf-CCCH(31) | TSC22(6) | MBD(12) |
| AP-2(8) | GCM(2) | zf-C2HC(11) | CSRNP_N(6) | P53(5) |
| Runt(5) | TF_Otx(5) | STAT(12) | CP2(8) | NF-YA(2) |
| SAND(9) | CSD(8) | zf-LITAF-like(6) | LRRFIP(3) | CSL(2) |
| CG-1(2) | HSF(5) | HPD(4) | AF-4(6) | GTF2I(2) |
| CBF(1) | NCU-G1(1) | COE(12) | DACH(2) | ESR-like(80) |
| HMGA(1) | Miscellaneous(134) | NGFIB-like(78) | RXR-like(81) | SF-like(79) |
| TF_bZIP(148) | THR-like(79) | GCNF-like(74) |