No. | Set | Subfamily | # sequence |
1 | Nuclear receptors (NR) | NR1: thyroid hormone like | 50 |
2 |
| NR2: HNF4-like | 36 |
3 |
| NR3: estrogen like | 37 |
4 |
| NR4: nerve growth factor IB-like | 7 |
5 |
| NR5: fushitarazu-F1 like | 12 |
6 |
| NR6: germ cell nuclear factor like | 5 |
7 |
| NR0: knirps and DAX like | 12 |
8 | Non-nuclear receptors (Non-NR) | N/A | 500 |