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

────────────────────────────────────┬───┬───┬───┬───┬───┬───┬────────── OR2S2
                                    │   │   │   │   │   │   └────── OR13C8
                                    │   │   │   │   │   └───┬────── OR13C4
                                    │   │   │   │   │       └────── OR13C3
                                    │   │   │   │   └───┬───┬────── OR13C5
                                    │   │   │   │       │   └────── OR13C2
                                    │   │   │   │       └────── OR13C9
                                    │   │   │   └───┬───┬────── OR2K2
                                    │   │   │       │   └────── OR13F1
                                    │   │   │       └────── OR13D1
                                    │   │   └────── OR13J1
                                    │   └────── OR13H1
                                    └───┬───┬────── OR2F2
                                        │   └────── OR2F1
                                        └───┬────── OR2D2
                                            └────── OR2D3