a kinetic study , carried out by using six major glutathione transferase ( gst ) isoenzymes isolated from the cytosol , indicated that gsts 3-3 , 3-4 and 4-4 ( class mu enzymes ) had much higher kcat/km values towards both sto enantiomers than the other three major isoenzymes , gsts 1-1 , 1-2 and 2-2 ( class alpha enzymes ) .
C0022173
isoenzymes
C0014442
enzymes