Receptors

Major nodes: ClassI | OR1/3/7 | OR2/13 | OR2M/T/V | OR4/12 | OR5/8/9 | OR5A/AN | OR6/10/11 | OR10D/G/S | OR14 | OR51/52 | Schiff6

────────────────────────────────────┬───┬───┬────── OR52P1
                                    │   │   └───┬────── OR52R1
                                    │   │       └────── OR52L1
                                    │   └───┬────── OR52K1
                                    │       └────── OR52K2
                                    └───┬───┬───┬───┬────── OR52N1
                                        │   │   │   └────── OR52N2
                                        │   │   └────── OR52N4
                                        │   └────── OR52N5
                                        └───┬───┬────── OR52A1
                                            │   └────── OR52A5
                                            └────── OR52A4