CSL Pink Plus and Blue Wide Range Protein Markers are designed to add colour to comparisons and separations and can be supplied in standard and wide molecular weight ranges. Each protein marker is covalently bound to a pink or blue colour chromaphore, while different coloured reference bands allow easy identification during electrophoresis and after transfer. The Pink Plus option is supplied as standard 10-175kDa with three reference bands while the Blue Wide version is supplied as 10-245kDa with 2 reference bands. The protein markers, which are supplied in loading buffer for convenient and immediate use, are visible in volumes as low as 3µL per well and are stable for two years when stored at -20°C and 3 months at 4°C.