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. 2010 Aug 13;15(8):5581–5594. doi: 10.3390/molecules15085581

Scheme 2.

Scheme 2

Formation of lanthionine (Lan) through alternative reactions of the transsulfuration pathway, and subsequent conversion to lanthionine ketimine by action of GTK (KAT1). Lan may also form by the action of CβS upon two molecules of Cys, in which case H2S is liberated [11].