Why life prefers one molecular “hand” - electron spin in chiral transport
Researchers from the Hebrew University of Jerusalem, University of Southern California, RPTU Kaiserslautern-Landau, Johannes Gutenberg-Universitat Mainz, Ariel University, California Institute of Technology, Uppsala University and the Weizmann Institute have reported a spin-dependent mechanism that may resolve one of the longest-standing questions in science: not only how homochirality emerged, but why a specific handedness was selected.
For more than 150 years, scientists have sought to understand why biological systems exclusively use one enantiomeric form – D-type for RNA and specific handedness for amino acids – despite the near-identical chemical properties of mirror-image molecules. Previous work established that homochirality could arise via enantioselective interactions with magnetic substrates, such as magnetite, through the chirality-induced spin selectivity (CISS) effect. However, this framework did not explain why one enantiomer is ultimately favored over the other.
Source: https://www.spintronics-info.com/why-life-prefers-one-molecular-hand-electron-spin-chiral-transport
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