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

────────────────────────────────────────┬───┬───┬────── OR51Q1
                                        │   │   └───┬───┬────── OR51A2
                                        │   │       │   └────── OR51A4
                                        │   │       └────── OR51A7
                                        │   └────── OR51L1
                                        └───┬───┬───┬───┬────── OR51B2
                                            │   │   │   └────── OR51B4
                                            │   │   └────── OR51B6
                                            │   └────── OR51B5
                                            └────── OR51V1