that occurs in A- and B-type granules is different. The true b-chains (b0, b1a, b1b, b2, and b3) newly formed during the isolation of the clusters by α-amylase are believed to playa role in interconnecting the clusters and they are therefore remnants of inter cluster segments of the parent AP molecule (Bertoftet al., 2012a). The major types of interblock chains within the clusters are b1- and b2-chains, which for the most part correspond to BS major-chains (DP ~8–25) in the original AP. The smallest type of B-chains is b0-chains