Myrosinase converts glucosinolates to isothiocyanates, but other enzymes can redirect the pathway, potentially reducing isothiocyanate formation.

“So myrosinase is a simple enzyme. It's a protein. It turns out that there are companion proteins that have slightly different activities or that modify the products of myrosinase. To make a complicated story even more complicated, the glucosinolate gets converted by myrosinase, not directly to an isothiocyanate, but to an unstable intermediate that then rearranges and forms the isothiocyanate.”