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The most commonly used hydrophobic ligands are phenyl and alkyl groups of varying chain lengths and differing hydrophobicity

However, avoid using them with highly acidic products, such as strong AHAs or retinoids, which may interfere with their effectiveness

The D-retro-inverso design replaces all L-amino acids with D-amino acids and reverses the sequence a structural strategy that preserves the side-chain topology of the original FOXO4 binding region while making the peptide resistant to proteolytic degradation, dramatically extending plasma half-life compared to the natural L-form

[DOI] [PubMed] [Google Scholar] 203.Kretz-Remy C., Arrigo A.P