A 10X solution of 40% Sucrose, 0.17% Xylene Cyanol, and 0.17% Bromophenol Blue. Supplied in one 1.4 mL tube. All Ambion® Gel Loading Solutions are rigorously tested for non-specific endonuclease activity, exonuclease activity, RNase activity, and for functionality. These are the same solutions we use in-house and in our kits.