these results , in conjunction with the observation that reaction of oxidized enzyme with sulfite results in the appearance of an additional equivalent of thiol capable of reacting with 5,5'-dithiobis- ( 2-nitrobenzoic acid ) or iodoacetate , indicate the presence of a disulfide linkage in the enzyme that can be reduced by dithionite or photochemically employing edta and 5-deazaflavin .
C0038750
sulfite
C0012787
dithionite