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D-proline is an isomer of the naturally occurring amino acid, L-Proline. D-amino acids have been found in relatively high abundance in human plasma and saliva . These amino acids may be of bacterial origin, but there is also evidence that they are endogenously produced through amino acid racemase activity .
D-proline is an isomer of the naturally occurring amino acid, L-Proline. D-amino acids have been found in relatively high abundance in human plasma and saliva . These amino acids may be of bacterial origin, but there is also evidence that they are endogenously produced through amino acid racemase activity .