RXFP1 | LGR7 | H2 relaxin > H1 relaxin > H3 relaxin ≫ INSL3 | RXFP1-truncate | 33P-H2 relaxin, 125I-H2 relaxin |
RXFP2 | LGR8 | INSL3 > H2 relaxin = H1 relaxin ≫ H3 relaxin | INSL3 B chain analoga; (des 1–8) A chain INSL3 analogb | 33P-H2 relaxin, 125I-H2 relaxin, 125I-INSL3 |
RXFP3 | GPCR135, SALPR | H3 relaxin > H3 relaxin B chain | INSL5 | 125I-H3 relaxin, 125I-H3-B/INSL5 A chimera |
RXFP4
| GPCR142, GPR100
| INSL5 = H3 relaxin > H3 relaxin B chain
|
| 125I-H3 relaxin, 125I-H3-B/INSL5 A chimera
|