Text from Keeling (©1998)
Starch granules come in many shapes and forms depending on the biological
origin. Starch is built inside the amyloplast compartment of plant cells. It is a truely unique structure. Although
we know alot about this complex structure, we do not know enough. It is composed of concentric rings of starch
arranged from an alignment of multiple blocklets. Each blocklet is in turn composed of
arrays of amylopectin molecules. Amylose is contained within this amylopectin matrix.
Although we know how amylopectin and amylose is made, we know
little about what determines the blocklet structures of the starch granule.