最終更新日:2022/12/24

All proteinogenic amino acids (AAs) are claimed to be levorotatory (L-configured). Nevertheless, dextrorotatory AAs (D-configured) are also found in nature (Gao et al., 2015; Ollivaux et al., 2014), for example, in the organic material of extraterrestrial comets (Cronin and Pizzarello, 1983), or, formed by slow racemization, in all dead biological material.

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