Protein molecular weight marker is a mixture of individually purified proteins mixed to give bands on SDS-PAGE. The marker is supplied in 10 mM Phosphate buffer (pH 7.0), KCl and 50% glycerol. The protein molecuar weight marker is ideal for use as standard during silver staining. The marker contains digested bands of different sizes and molecular weights of protein which helps in identification of molecular weight of unknown protein under experiment. The marker is useful for identifying molecular weight of proteins over a range and comes in 0.25ml. The marker comes in volumes sufficient for 25 lanes loading. The protein, their respective molecular weights (MW) are as follows - Myosin Rabbit Muscle b (205000 Da),Phosphorylase b(97,400 Da) BSA (66,000 Da), Ovalbumin ( 43,000 Da), Carbonic Anhydrase ( 29,000 Da), Soyabean Trypsin Inhibitor (20100 Da), Lysozyme (14,300 Da), Aprotinin ( 6,500 Da) insulin (alpha & beta chains) (3500 Da).It should be stored at -20-degree Celsius for long term use or 4 degree Celsius for daily usages.