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

────────────────────────────────────────────┬───┬───┬───┬───┬────── OR4C6
                                            │   │   │   │   └───┬────── OR4C12
                                            │   │   │   │       └───┬────── OR4C13
                                            │   │   │   │           └────── OR4C46
                                            │   │   │   └────── OR4C3
                                            │   │   └───┬───┬────── OR4C5
                                            │   │       │   └────── OR4C45
                                            │   │       └────── OR4C15
                                            │   └────── OR4C11
                                            └────── OR4C16