Prestained Protein Ladder is a ready-to-use formulation which does not require boiling, contains 10 prestained proteins covering a wide range of molecular weights (10~180 kDa) and includes a orange reference band at 70 kDa and a green reference band at 10 kDa. The protein ladder is designed for monitoring protein separation during SDS-PAGE, verification of Western blot transfer (PVDF, nylon or nitrocellulose membranes) and for the approximate sizing of proteins. Supplied as a ready-to use formulation in gel loading buffer, the ladder requires no heating, dilution or addition of reducing agents.

Lot-to-lot variation of apparent molecular weight of prestained proteins is less than 3%.