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D-Amino acid
Class of chemical compounds / From Wikipedia, the free encyclopedia
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ᴅ-Amino acids are amino acids where the stereogenic carbon alpha to the amino group has the ᴅ-configuration. For most naturally-occurring amino acids, this carbon has the ʟ-configuration. ᴅ-Amino acids are occasionally found in nature as residues in proteins. They are formed from ribosomally-derived ᴅ-amino acid residues.[1]
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Amino acids, as components of peptides, peptide hormones, structural and immune proteins, are the most important bioregulators involved in all life processes along with nucleic acids, carbohydrates and lipids. "Environmental ᴅ-amino acids are thought to be derived from organic diagenesis such as racemization and release from bacterial cell walls and even from microbial production."[2]