Sample Buffer for Clear Native (2x) Sample buffer for Clear Native PAGE. Supplied as 2x concentrate.Contains 100 mM NaCl, 100 mM imidazole, 4 mM 6-aminocaproic acid, 2 mM EDTA, 0.02 % Ponceau S, 20 % glycerol. Size - 20ML Storage Conditions - -15 °C TO -25 °C Catalog