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

────────────────────────────────────┬───┬───┬───┬───┬───┬────── OR52E2
                                    │   │   │   │   │   └────── OR52E4
                                    │   │   │   │   └────── OR52E6
                                    │   │   │   └────── OR52E8
                                    │   │   └────── OR52E1
                                    │   └───┬───┬───┬────── OR52B2
                                    │       │   │   └────── OR52B6
                                    │       │   └────── OR52B4
                                    │       └────── OR52H1
                                    └────── OR52J3