Major nodes: Class I | OR1/3/7 | OR2/13 | OR4 | OR5/8/9 | OR6/10/11 | OR10D/G/S | OR12 | OR14-like | Olfactory TAARs────────────────────────────────────────────────────┬───┬───┬────── OR1L3
│ │ └────── OR1L1
│ └────── OR1L8
└───┬────── OR1L4
└────── OR1L6
