TBE Buffer, 10X (pH 8.3), is used for polyacrylamide and agarose gel electrophoresis. This product has been optimized for use in DNA applications. Quality Tested: Each lot of TBE Buffer is tested and certified to be free of DNase and RNase activity. Composition: 890mM Tris-borate, 890mM boric acid, 20mM EDTA.