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