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

────────────────────────────────────────────┬───┬───┬───┬───┬────── OR52E1
                                            │   │   │   │   └────── OR52E2
                                            │   │   │   └────── OR52E4
                                            │   │   └───┬────── OR52E6
                                            │   │       └────── OR52E8
                                            │   └────── OR52J3
                                            └────── OR52D1