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

────────────────────────────────────┬───┬───┬───┬───┬────────── OR52L1
                                    │   │   │   │   └────── OR52P1
                                    │   │   │   └────────── OR52R1
                                    │   │   └───┬────── OR52K2
                                    │   │       └────── OR52K1
                                    │   └───┬───┬───┬───┬────── OR52N2
                                    │       │   │   │   └────── OR52N1
                                    │       │   │   └────── OR52N4
                                    │       │   └────── OR52N5
                                    │       └───┬────── OR52A1
                                    │           └────── OR52A4
                                    └───┬───┬───┬───┬───┬───┬────── OR52E1
                                        │   │   │   │   │   └────── OR52E2
                                        │   │   │   │   └────── OR52E4
                                        │   │   │   └───┬────── OR52E6
                                        │   │   │       └────── OR52E8
                                        │   │   └────── OR52J3
                                        │   └────── OR52D1
                                        └───┬───┬───┬────── OR52B6
                                            │   │   └────── OR52B4
                                            │   └────── OR52H1
                                            └────── OR52B2