Leishmania major and Trypanosoma cruzi glutathione-S-transferase (GST) has undergone gene duplication, diversification, and gene fusion leading to an four domain enzyme which contains two repeats of a GST N-terminal domain followed by a GST C-terminal domain [1].

1: Leishmania TDR1 structure, a unique trimeric glutathione transferase capable of deglutathionylation and antimonial prodrug activation. Fyfe PK, Westrop GD, Silva AM, Coombs GH, Hunter WN; Proc Natl Acad Sci U S A. 2012;109:11693-11698. PMID:22753509