Receptors

Major nodes: Class I | OR1/3/7 | OR2/13 | OR4 | OR5/8/9 | OR6/10/11 | OR10D/G/S | OR12 | OR14-like | Olfactory TAARs

────────────────────────────────────────────────────────────────────┬───┬───┬───┬────── OR4C13
                                                                    │   │   │   └────── OR4C46
                                                                    │   │   └───┬────── OR4C12
                                                                    │   │       └────── OR4C45
                                                                    │   └───┬────── OR4C6
                                                                    │       └────── OR4C5
                                                                    └───┬────── OR4C3
                                                                        └────── OR4C15