Peptides are short chains of amino acids that occur in our body, in plants or bacteria to control diverse functions. Several peptides are used as drugs such as insulin, which controls the metabolism of sugar; and cyclosporine, which suppresses organ rejection after transplants. More than 40 peptides are already approved as drugs, generating revenues in the billions. There are several hundreds of peptide-based medications currently in clinical trials.
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Source: Phys.org