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

────────────────────────────────────────────┬───┬───┬────── OR3A3
                                            │   │   └────── OR3A2
                                            │   └────── OR3A1
                                            └────── OR3A4