Mutations to Cysteine Residues in the Trypanosoma cruzi B-Cell Superantigen Tc24 Diminish Susceptibility to IgM-Mediated Hydrolysis. - Gunter SM; Jones KM; Seid CA; Essigmann HT; Zhan B; Strych U; Bottazzi ME; Hotez PJ; Brown EL (The Journal of parasitology, 2017)