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
────────────────┬───────────────────┬───────┬───┬───────────────────┬───┬────────── OR5AR1
                │                   │       │   │                   │   └────────── OR5AS1
                │                   │       │   │                   └────────── OR5AP2
                │                   │       │   └───────────┬────── OR5AK3
                │                   │       │               └────── OR5AK2
                │                   │       └───┬───┬────── OR5A1
                │                   │           │   └────── OR5A2
                │                   │           └────── OR5AN1
                │                   └────────────────────────────── OR5AC2
                └────────────── OR5AU1