Industrial enzymes produced in bulk generally require little downstream processing and hence are relatively crude preparations. The commercial use of α-amylase generally does not require purification of the enzyme, but enzyme applications in pharmaceutical and clinical sectors require high purity amylases. The enzyme in the purified form is also a prerequisite in studies of structure-function relationships and biochemical properties (29). Different strategies for purification of enzymes have been investigated, exploiting specific characteristics of the target biomolecule.