2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA isomerase (, paaG (gene), 1,2-epoxyphenylacetyl-CoA isomerase) is an enzyme with systematic name 2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA isomerase. This enzyme catalyses the following chemical reaction
The enzyme catalyses the reversible isomerization of 2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA.