Patent ID: 7678555

Claim:
A process for producing a starch, comprising: treating a feed starch that comprises amylopectin with glucanotransferase in aqueous solution or suspension at a temperature of about 70-100° C. and a pH of 5.0-6.0 to produce a chain-extended starch, wherein the glucanotransferase is used in a dosage of about 9 mg enzyme protein to about 13.5 mg enzyme protein per 100 grams of feed starch; treating the chain-extended starch with a debranching enzyme to produce a starch product that comprises amylose fragments; heating the starch product in aqueous solution or suspension at a temperature of at least about 90° C.; and membrane filtering a solution or dispersion of the starch product to increase the concentration of amylose fragments that have a degree of polymerization (DP) from 37 to 100; wherein from about 38% by weight to 51.2% by weight of the amylose fragments have a degree of polymerization (DP) from 37 to 100; and wherein the starch product has a polydispersity of about 2-4.