Receptors

Major nodes: Class I | OR1/3/7 | OR2/13 | OR4 | OR5/8/9 | OR6/10/11 | OR10D/G/S | OR12 | OR14-like | Olfactory TAARs

────────────────────────────────────────────────────┬───┬───┬────── OR4L1
                                                    │   │   └───┬───┬───┬───┬───┬───┬────── OR4K15
                                                    │   │       │   │   │   │   │   └────── OR4K5
                                                    │   │       │   │   │   │   └───┬────── OR4K14
                                                    │   │       │   │   │   │       └────── OR4K13
                                                    │   │       │   │   │   └───┬────── OR4K3
                                                    │   │       │   │   │       └────── OR4K2
                                                    │   │       │   │   └────── OR4K1
                                                    │   │       │   └────── OR4K17
                                                    │   │       └───┬───┬───┬───────────┬────── OR4F3
                                                    │   │           │   │   │           └────── OR4F21
                                                    │   │           │   │   └────── OR4F15
                                                    │   │           │   └────── OR4F6
                                                    │   │           └───┬───┬────── OR4F4
                                                    │   │               │   └────── OR4F17
                                                    │   │               └────── OR4F5
                                                    │   └───┬───┬───┬────── OR4D5
                                                    │       │   │   └───┬────── OR4Q2
                                                    │       │   │       └────── OR4Q3
                                                    │       │   └───┬───┬───┬───┬────── OR4D11
                                                    │       │       │   │   │   └────── OR4D10
                                                    │       │       │   │   └────── OR4D9
                                                    │       │       │   └────── OR4D6
                                                    │       │       └───┬────── OR4D1
                                                    │       │           └────── OR4D2
                                                    │       └───┬───┬───┬────── OR4N4
                                                    │           │   │   └────── OR4N2
                                                    │           │   └────── OR4N5
                                                    │           └───┬────── OR4M1
                                                    │               └────── OR4M2
                                                    └────── OR4E2