A chemical reaction that demonstrates how key molecules in the biological world might have come to be predominately left or right handed has been reported by scientists at Imperial College London.
Ever since discovering that the building blocks of the biological world, such as amino acids and sugars, are distinctively left or right handed - possessing a quality known as chirality - scientists have been puzzling to answer how and why.
They believe that at the dawn of biological life there were even numbers of molecules in each form, but through hitherto unknown processes, one particular form came to completely dominate over the others (for example left-handed amino acids and right-handed sugars), a feature known as homochirality.
Now, using simple organic molecules, the Imperial researchers have demonstrated that an amino acid itself can amplify the concentration of one particular chiral form of reaction product. Importantly, the experiment works in similar conditions to those expected around pre-biotic life and displays all the signs to suggest it may be a model for how biological homochirality evolved.
The research is published this week in the journal Angewandte Chemie International Edition ...
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