Receptors

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

────────────────────────────────────────────────────────┬───┬───┬───┬───┬────── OR4C13
                                                        │   │   │   │   └────── OR4C46
                                                        │   │   │   └───┬────── OR4C12
                                                        │   │   │       └────── OR4C45
                                                        │   │   └───┬────── OR4C6
                                                        │   │       └────── OR4C5
                                                        │   └───┬────── OR4C3
                                                        │       └────── OR4C15
                                                        └───┬───┬───┬────── OR4A5
                                                            │   │   └────── OR4A16
                                                            │   └───┬────── OR4A4
                                                            │       └────── OR4A47
                                                            └────── OR4A15