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Examples of FDA-Approved Peptides Insulin used to treat diabetes GLP-1 peptides used for metabolic conditions Oxytocin used in obstetrics These compounds have gone through rigorous peptide clinical trials and regulatory review

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26 Studies have demonstrated that arginine and lysine amino acid substitution in peptides favorably facilitate insertion into bacteria membrane due to their positive charge interacting with bacterial membrane, while the presence of hydrophobic amino acids such as tryptophan and phenylalanine within peptide sequences are associated intensified antimicrobial activity against bacteria