Store › DTT (Dithiothreitol) Image 1 of 1 DTT (Dithiothreitol) $67.95 H411 | 1×2 mLA general-purpose reagent; a serum treatment to differentiate IgG and IgM antibodies. See More > Added! H411 | 1×2 mLA general-purpose reagent; a serum treatment to differentiate IgG and IgM antibodies.