| protein C-terminus binding | GO:0008022 | 4.5 |
| cation channel activity | GO:0005261 | 4.04 |
| morphine receptor activity | GO:0038047 | 9.74 |
| calcium channel activity | GO:0005262 | 5.03 |
| neuropeptide receptor activity | GO:0008188 | 5.95 |
| molecular transducer activity | GO:0060089 | 2.32 |
| binding | GO:0005488 | 0.18 |
| signal transducer activity | GO:0004871 | 2.28 |
| beta-endorphin receptor activity | GO:0004979 | 9.74 |
| melanocortin receptor activity | GO:0004977 | 7.95 |
| G-protein coupled peptide receptor activity | GO:0008528 | 4.86 |
| G-protein coupled receptor activity | GO:0004930 | 2.95 |
| peptide binding | GO:0042277 | 4.22 |
| neuropeptide binding | GO:0042923 | 6.65 |
| transmembrane transporter activity | GO:0022857 | 2.82 |
| divalent inorganic cation transmembrane transporter activity | GO:0072509 | 4.62 |
| G-protein alpha-subunit binding | GO:0001965 | 6.6 |
| voltage-gated cation channel activity | GO:0022843 | 4.83 |
| transporter activity | GO:0005215 | 2.57 |
| passive transmembrane transporter activity | GO:0022803 | 3.6 |
| metal ion transmembrane transporter activity | GO:0046873 | 3.71 |
| G-protein beta-subunit binding | GO:0031681 | 7.54 |
| filamin binding | GO:0031005 | 7.17 |
| opioid receptor activity | GO:0004985 | 7.66 |
| calcium ion transmembrane transporter activity | GO:0015085 | 4.89 |
| amide binding | GO:0033218 | 4.14 |
| ion channel activity | GO:0005216 | 3.71 |
| cation transmembrane transporter activity | GO:0008324 | 3.32 |
| peptide receptor activity | GO:0001653 | 4.84 |
| protein domain specific binding | GO:0019904 | 3.32 |
| voltage-gated calcium channel activity | GO:0005245 | 6.0 |
| voltage-gated ion channel activity | GO:0005244 | 4.49 |
| substrate-specific transmembrane transporter activity | GO:0022891 | 2.9 |
| inorganic cation transmembrane transporter activity | GO:0022890 | 3.49 |
| substrate-specific transporter activity | GO:0022892 | 2.72 |
| cytoskeletal protein binding | GO:0008092 | 3.02 |
| ion transmembrane transporter activity | GO:0015075 | 3.04 |
| voltage-gated channel activity | GO:0022832 | 4.49 |
| transmembrane signaling receptor activity | GO:0004888 | 2.57 |
| channel activity | GO:0015267 | 3.6 |
| gated channel activity | GO:0022836 | 3.96 |
| protein binding | GO:0005515 | 0.46 |
| signaling receptor activity | GO:0038023 | 2.49 |
| substrate-specific channel activity | GO:0022838 | 3.67 |
| transmembrane receptor activity | GO:0099600 | 2.53 |
| receptor activity | GO:0004872 | 2.32 |