5(6)-ROX maleimide has C6-linker that enhances the fluorescence after the dye is conjugated to proteins. The product is a direct replacement of 5(6)-carboxy-X-rhodamine C5-maleimide (91041). &lamba; Ex/&lamba; Em (MeOH) = 568/595 nm Red solid soluble in DMF or DMSO Store at -20°C and protect from light, especially in solution C43H44N4O6 MW: 712.81