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. Author manuscript; available in PMC: 2020 May 21.
Published in final edited form as: Meteorit Planet Sci. 2018 Oct 14;54(1):142–156. doi: 10.1111/maps.13202

Scheme 1.

Scheme 1.

The Strecker-cyanohydrin synthesis reaction (illustration adapted from Elsila et al., 2016), yielding α-amino acids in the presence of NH3 and α-hydroxy acids in the absence of NH3 (Peltzer et al., 1984). Colors are used to trace the path of different carbon atoms from precursor to products.