Starch exists in plants as insoluble starch granules in chloroplasts. Each starch granule holds a combination of two polysaccharide forms, amylopectin and amylose. The Amylose is an unbranched polymer of glucose residues joined in α1-4 linkages. An Amylopectin is the branched form; most of the constituent glucose residues are connected in α1-4 linkages but additional α1-6 bonds happen every 25-30 residues, establishing the branchpoints.