The structure of a zeta class glutathione S transferase from Arabidopsis thaliana: characterisation of a GST with novel active site architecture and a putative role in tyrosine catabolism ScienceDirect The structure of a zeta class glutathione S transferase from Arabidopsis thaliana: characterisation of a GST with novel active site architecture and a putative role in tyrosine catabolism ScienceDirect The role of glutathione S transferases in human disease pathogenesis and their current inhibitors ScienceDirect RCSB PDB 1GNW: STRUCTURE OF GLUTATHIONE S TRANSFERASE