Intersubunit disulfide bonds in the molecule of baker's yeast transketolase

Abstract

It has previously been shown that baker's yeast trans ketolase has no intersubunit disulfide bonds and is able to dissociate reversibly into subunits at a low apoprotein concentration in solution. By contrast, in the present work it was found that in the molecule of transketolase C (a newly discovered form of the enzyme) subunits are bound to each other by disulfide bonds.