Polypeptide drugs generally refer to peptide drugs based on amino acids with or without chemical modifications. Their molecular weight is less than 5000 Da, having strengths such as high specificity and good efficacy. Polypeptides as therapeutic drugs offer many advantages over proteins as macromolecules in that their preparation can achieve high purity and controllable quality, and it’s easier to determine their structures. Leto Laboratories has the capacity to develop polypeptide drugs at full process- from designing all the way to production.