 In addition, 2-F-2-deoxybenzylglucosinolate, which was synthesized specifically to study the mechanism of myrosinase, inhibits the enzyme by trapping one of the glutamic acid residues in the active site, Glu 409.Myrosinase exists as a dimer with subunits of 60-70 kDa each.X-ray crystallography of myrosinase isolated from "Sinapis alba" revealed the two subunits are linked by a zinc atom.