... ammonium sulfate precipitation, starch affinity chroma-tography, and anion-exchange chromatography, as describedby Khoshnoodi (SBE I) [18] and Larsson (SBE II) [19]. The preparations of potato ... Comparison of starch branching enzyme I and II from potatoUlrika Rydberg1, Lena Andersson2, Roger Andersson2, Per A˚man2 and Ha˚kan Larsson11Department of Plant Biology, and 2Department ... amylose and amylopectin with the starch–iodine assayAmylose (type III, Sigma) and amylopectin (Sigma) from potato were typically dissolved at 10 mg:mL21in 0.5 MNaOH. The solutions were buffered...