obsolete 2-mercaptobenzothiazole-cis-6,7-dihydrodiol dehydrogenase activity (obsolete GO:0034837)
OBSOLETE. Catalysis of the reaction: 2-mercaptobenzothiazole-cis-6,7-dihydrodiol = 6,7-dihydroxy-2-mercaptobenzothiazole + 2 H+ + 2 e-.