Receptors

Major nodes: ClassI | OR1/3/7 | OR2/13 | OR2M/T/V | OR4/12 | OR5/8/9 | OR5A/AN | OR6/10/11 | OR10D/G/S | OR14 | OR51/52 | Schiff6

────────────────────────────────────────────────────────┬───┬───┬───┬───┬────── OR4D10
                                                        │   │   │   │   └────── OR4D11
                                                        │   │   │   └────── OR4D9
                                                        │   │   └────── OR4D6
                                                        │   └───┬────── OR4D1
                                                        │       └────── OR4D2
                                                        └────── OR4D5