| cation channel activity | GO:0005261 | 4.04 |
| acetylcholine receptor activity | GO:0015464 | 6.3 |
| molecular transducer activity | GO:0060089 | 2.32 |
| receptor activity | GO:0004872 | 2.32 |
| signal transducer activity | GO:0004871 | 2.28 |
| signaling receptor activity | GO:0038023 | 2.49 |
| ammonium ion binding | GO:0070405 | 5.81 |
| G-protein coupled receptor activity | GO:0004930 | 2.95 |
| serotonin receptor activity | GO:0099589 | 6.85 |
| ligand-gated ion channel activity | GO:0015276 | 4.8 |
| ion binding | GO:0043167 | 1.36 |
| transmembrane transporter activity | GO:0022857 | 2.82 |
| channel activity | GO:0015267 | 3.6 |
| passive transmembrane transporter activity | GO:0022803 | 3.6 |
| extracellular ligand-gated ion channel activity | GO:0005230 | 5.42 |
| G-protein coupled serotonin receptor activity | GO:0004993 | 6.91 |
| neurotransmitter receptor activity | GO:0030594 | 5.5 |
| cation binding | GO:0043169 | 1.4 |
| GO:0005232 | 7.95 |
| transporter activity | GO:0005215 | 2.57 |
| ion channel activity | GO:0005216 | 3.71 |
| excitatory extracellular ligand-gated ion channel activity | GO:0005231 | 5.73 |
| acetylcholine binding | GO:0042166 | 6.56 |
| neurotransmitter binding | GO:0042165 | 6.34 |
| cation transmembrane transporter activity | GO:0008324 | 3.32 |
| G-protein coupled amine receptor activity | GO:0008227 | 5.83 |
| substrate-specific transmembrane transporter activity | GO:0022891 | 2.9 |
| substrate-specific transporter activity | GO:0022892 | 2.72 |
| ion transmembrane transporter activity | GO:0015075 | 3.04 |
| transmembrane signaling receptor activity | GO:0004888 | 2.57 |
| acetylcholine-activated cation-selective channel activity | GO:0004889 | 6.65 |
| gated channel activity | GO:0022836 | 3.96 |
| protein binding | GO:0005515 | 0.46 |
| ligand-gated channel activity | GO:0022834 | 4.8 |
| substrate-specific channel activity | GO:0022838 | 3.67 |
| transmembrane receptor activity | GO:0099600 | 2.53 |
| binding | GO:0005488 | 0.18 |