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

────────────────────────────────────────────┬───┬───┬───┬───┬───┬────── OR1D4
                                            │   │   │   │   │   └────── OR1D5
                                            │   │   │   │   └────── OR1D2
                                            │   │   │   └───┬────── OR1N1
                                            │   │   │       └────── OR1N2
                                            │   │   └───┬────── OR1A1
                                            │   │       └────── OR1A2
                                            │   └───┬────── OR1M1
                                            │       └───┬────── OR1S1
                                            │           └────── OR1S2
                                            └───┬───┬────── OR1I1
                                                │   └───┬───┬───┬───┬────── OR1E1
                                                │       │   │   │   └────── OR1E2
                                                │       │   │   └────── OR1E3
                                                │       │   └───┬───┬────── OR1J1
                                                │       │       │   └────── OR1J4
                                                │       │       └────── OR1J2
                                                │       └───┬───┬────── OR1F1
                                                │           │   └────── OR1F2
                                                │           └────── OR1F12
                                                └────── OR1G1