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
────────────────────────────┬────────────────────────────────────────────── OR8S1
                            └───────────────────────┬───────┬───────┬───┬───┬───┬────── OR8K5
                                                    │       │       │   │   │   └────── OR8K3
                                                    │       │       │   │   └────── OR8K1
                                                    │       │       │   └───┬────── OR8J3
                                                    │       │       │       └────── OR8J1
                                                    │       │       └───────────┬───┬────── OR8U1
                                                    │       │                   │   └────── OR8U9
                                                    │       │                   └────── OR8U8
                                                    │       └───┬───┬───┬───┬────── OR8B8
                                                    │           │   │   │   └────── OR8B12
                                                    │           │   │   └───┬───┬────── OR8B3
                                                    │           │   │       │   └───┬───┬────── OR8G1
                                                    │           │   │       │       │   └────── OR8G5
                                                    │           │   │       │       └────── OR8G2
                                                    │           │   │       └────── OR8B2
                                                    │           │   └────── OR8B4
                                                    │           └───┬───┬────────── OR8A1
                                                    │               │   └───┬────── OR8D1
                                                    │               │       └────── OR8D2
                                                    │               └────── OR8D4
                                                    └───────┬───┬───┬────── OR8H3
                                                            │   │   └────── OR8H2
                                                            │   └────── OR8H1
                                                            └────── OR8I2