| PF00060 | Ligand-gated ion channel (Lig_chan) | Ligand-gated ion channel | - | Family |
| PF01094 | Receptor family ligand binding region (ANF_receptor) | Receptor family ligand binding region | This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure. | Domain |
| PF00060 | Ligand-gated ion channel (Lig_chan) | Ligand-gated ion channel | - | Family |
| PF01094 | Receptor family ligand binding region (ANF_receptor) | Receptor family ligand binding region | This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure. | Domain |