20X MES SDS Running Buffer, pH 7.3, 8 X 500mL" Specification Value Concentration 20X Name MES SDS Running Buffer pH at 1x pH 7. 3 Volume 8 x 500mL SKU MES 20 0400 Composition at 1x Tris 50 mM, MES 50 mM, SDS 0. 1%, EDTA 1 mM An optimized running buffer for resolving low to mid molecular weight proteins on Bis Tris polyacrylamide gels using SDS PAGE. This formulation delivers sharp band resolution and consistent electrophoretic migration for accurate protein analysis. The buffer system provides