... Scrutton1Departments of 1Biochemistry and2Chemistry, University of Leicester, UKRecent years have witnessed high levels of activity in iden-tifying enzyme systems that catalyse H-transfer by quantumtunneling. ... increasing the catalytic efficiency of enzymes inthe biotechnology industry (by enhancing the coupling of dynamics to the reaction coordinate), and (b) producingmore effective enzyme inhibitors in ... nss4@le.ac.ukAbbreviations:TST,transitionstatetheory;TTQ,tryptophantrypto-phylquinone; MADH, methylamine dehydrogenase; AADH, aroma-tic amine dehydrogenase; TMADH, trimethylamine dehydrogenase;TSOX, heterotetrameric sarcosine dehydrogenase;...