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

────────────────────────────────────────────────────────────┬───┬───┬────── OR4D5
                                                            │   │   └───┬────── OR4Q2
                                                            │   │       └────── OR4Q3
                                                            │   └───┬───┬───┬───┬────── OR4D11
                                                            │       │   │   │   └────── OR4D10
                                                            │       │   │   └────── OR4D9
                                                            │       │   └────── OR4D6
                                                            │       └───┬────── OR4D1
                                                            │           └────── OR4D2
                                                            └───┬───┬───┬────── OR4N4
                                                                │   │   └────── OR4N2
                                                                │   └────── OR4N5
                                                                └───┬────── OR4M1
                                                                    └────── OR4M2