Figure 4 - Reactivity of mAbs 1D9, 2C2, 4B5 and 4B9 with amastigote polypeptides is polymorphic among different T. cruzi strains and clones. Extracellular amastigote (LIT medium) extracts were processed for immunoblotting as described elsewhere (35). Apparent molecular masses in kilodaltons are indicated on the left of each panel.