| Domain | Name | Category | Type |
| IPR000832 | GPCR, family 2, secretin-like | Family | Family |
| IPR001879 | GPCR, family 2, extracellular hormone receptor domain | Domain | Domain |
| IPR002144 | GPCR, family 2, secretin receptor | Family | Family |
| IPR017981 | GPCR, family 2-like | Domain | Domain |
| IPR017983 | GPCR, family 2, secretin-like, conserved site | Site | Conserved site |
| IPR036445 | GPCR family 2, extracellular hormone receptor domain superfamily | Family | Homologous superfamily |