Isoelectric focusing is an electrophoretic method in separating proteins depending on their pIs. Creative offer a high-resolution IEF that can separate proteins differing in pI by less than 0.05 pH unit. Creative proteomics will carefully choose ampholyte or IPG range centered on the pI of the proteins of interest for different antibodies, antigens, and enzymes, which is very important to the success of a fractionation.