What is 4R-Hydroxyproline? Unpacking its Role in Collagen
                                
                                
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                                    5 min read                                
                            
                                Over 13% of mammalian collagen is composed of hydroxyproline, an essential modified amino acid crucial for the protein's stability. This article delves into the specific and most prevalent form, 4R-hydroxyproline, explaining its biological function and importance in human health.