L amino acid is capable of rotating plane polarized light anticlockwise and D is capable in rotating clockwise
In non-ribosomal physiology, D-amino acids, which are chiral forms of L-amino acids, are known to be useful. Life appears to select one of the enantiomers for biological functions, despite the fact that all proteinogenic amino acids—aside from glycine—have chiral versions.
The main difference between L and D is that L is amino acid is the enantiomers of an amino acid which is capable of rotating plane polarized light anticlockwise or the left hand side whereas D amino acid is the enantiomers of an amino acid which is capable of rotating plane polarized light in clockwise.
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