We provides a variety of buffers for life science research, including those used for protein and nucleic acid experiments. Our buffers are made with high-purity water and highest quality reagents and filtered with 0.45 µm membranes. The 4L and 10 L box-packed buffers are compact and come with easy pouring sprout. They provide cost-savings and convenience. Formulated for running proteins on Bis-Tris gels, including Invitrogen's NuPAGE® Bis-Tris gel. MOPS/SDS Running Buffer is preferred for separating medium- to large-sized proteins. Composition: Tris 50 mM, MOPS 50 mM, SDS 0.1%, EDTA 1 mM, pH 7.7 Storage: 40C