The PM2400 ExcelBand Pink Blue Protein Marker is a two-color protein standard with 11 pre-stained proteins covering a wide range of molecular weights from 10 to 175 kDa in Tris-Glycine buffer (10 to 165 kDa in Bis-Tris (MOPS) buffer and 7 to 165 kDa in Bis-Tris (MES) buffer). Proteins are covalently coupled with a pink chromophore except for three reference bands of blue color (at 10, 40, and 90 kDa, respectively) when separated on SDS-PAGE (Tris-Glycine buffer).