ClearBand Prestained Protein Marker is a protein standard containing 12 pre-stained proteins covering a wide molecular weight range from 10 to 245 kDa. Proteins are covalently coupled with a blue chromophore except for two reference bands (one green and one red band at 25 kDa and 75 kDa respectively) when separated on SDS-PAGE (Tris-glycine buffer).