Table 2. Comparative insulin B-chain amino acid sequences by species.
| Species | Sequence a |
| Ferret | FVNQHLCGSHLVEALYLVCGERGFFYTPKA |
| Human | FVNQHLCGSHLVEALYLVCGERGFFYTPKT |
| Lispro | FVNQHLCGSHLVEALYLVCGERGFFYTKPT |
| Mouse(1) | FVKQHLCGPHLVEALYLVCGERGFFYTPKS |
| Mouse(2) | FVKQHLCGSHLVEALYLVCGERGFFYTPMS |
| Dog | FVNQHLCGSHLVEALYLVCGERGFFYTPKA |
| Pig | FVNQHLCGSHLVEALYLVCGERGFFYTPKA |
| Cat | FVNQHLCGSHLVEALYLVCGERGFFYTPKA |
a
Differences in sequence from that of ferret are bolded. The ferret insulin Ensembl gene identification is ENSMPUG00000005638.