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TBE (Tris-borate-EDTA) buffer is used for nucleic acid electrophoresis and provides better resolution of larger DNA fragments, while TAE (Tris-acetate-EDTA) buffer is commonly used for agarose gel electrophoresis of DNA. The primary difference between the two buffers is the anion used (borate vs. acetate), which can affect the mobility of DNA fragments during electrophoresis.