Engineered disulfide bonds and their effects on the hemolytic activity of CAMP factor.
A, locations of mutant cysteine pairs. The NTD points upward. B, SDS-PAGE of disulfide mutants in the absence and presence of the disulfide-reducing agent DTT. Accelerated migration indicates presence of disulfide bonds. C, hemolytic activity of each mutant with and without DTT. n/a, not applicable. Error bars, S.E.