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
────────────────────────────┬───────────────────────────────────────────────┬────── OR9A2
                            │                                               └────── OR9A4
                            └───────┬───────┬───┬────── OR9Q1
                                    │       │   └────── OR9Q2
                                    │       └────── OR9I1
                                    └───────────┬───────┬────── OR9G4
                                                │       └───┬────── OR9G1
                                                │           └────── OR9G9
                                                └────── OR9K2