Carbo-Free Blocking Solution (SP-5040) is a protein-based agent used as a general blocking or diluent solution. Unlike serum, nonfat dry milk, casein, or other common protein containing blocking agents, this product is essentially free of glycoproteins. This solution is ideal for applications using lectins in which glycoprotein contamination could generate background staining or false positive results. It is supplied as 125 ml of a 10x concentrate.