Percentage of amino acid sequence identity between functionally expressed cannabinoid receptors
| CB1 Zebra Finch | CB1 Human | CB1 Rat | CB1 Mouse | CB1 Newt | CB2 Mouse | CB2 Rat | CB2 Human | |
|---|---|---|---|---|---|---|---|---|
| CB1 zebra finch | 100 | |||||||
| CB1 human | 92 | 100 | ||||||
| CB1 rat | 92 | 97 | 100 | |||||
| CB1 mouse | 92 | 97 | 97 | 100 | ||||
| CB1 newt | 86 | 84 | 84 | 84 | 100 | |||
| CB2 mouse | 44 | 43 | 44 | 44 | 44 | 100 | ||
| CB2 rat | 44 | 43 | 44 | 44 | 43 | 93 | 100 | |
| CB2 human | 40 | 40 | 41 | 41 | 40 | 82 | 81 | 100 |