Affinity chromatography of mustard β-amylase on starch columns

An affinity chromatography method for purification of β-amylase from cytoledons of whit mustard seedlings (Sinapsi alba L.) is described. β-Amylase is bound to starch column, while other contaminating proteins are eluted with the binding buffer. The bound β-amylase is eluted by including dextrin (1%, w/v) in binding buffer. This method yielded a homogenous preparation of β-amylase enzyme, which migrated as a single polypetide band in SDS electrophoresis.