N,N,N',N'-Tetramethylethylethylenediamine (TEMED) is a catalyst used in polyacrylamide gel electrophoresis (PAGE) to initiate the polymerization of acrylamide and bis-acrylamide. It accelerates the formation of free radicals, leading to the cross-linking of the monomers and the formation of the gel matrix., Alternative Names: TEMED, Supplier: Sigald.