Abstract
Quantitative and qualitative analysis of uncooked zein and kafirin fractions were performed through sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and electrophoretic profiles. Kafirins and zeins present the same oligomer and monomer compositions with the exception of a 66 kDa oligomer that is only present in kafirins. The quantitative analysis showed differences between zein and kafirin. The composition of each oligomer was established via preparative SDS-PAGE. Part of the cooked oligomers resists reduction; the presence of those oligomers could be related to the decrease on protein digestibility with the cooking process.
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