Our bodies use only 'left-handed' amino acids and 'right-handed' sugars. Hints are now emerging on how this handedness evolved and how cooperativity among like-handed molecular components came about.
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Siegel, J. Single-handed cooperation. Nature 409, 777–778 (2001). https://doi.org/10.1038/35057421
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DOI: https://doi.org/10.1038/35057421
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