Plant starch compostion
AssigneeNational Starch and Chemical Corporation
InventorsDavid Cooke, Martine Debet, Michael J. Gidley, Stephen A. Jobling, Richard Safford, Christopher M. Sidebottom, Roger J. Westcott
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Abstract
Disclosed is a nucleotide sequence encoding an effective portion of a class A starch branching enzyme (SBE) obtainable from potato plants, or a functional equivalent thereof, together with, inter alia, a corresponding polypeptide, a method of altering the characteristics of a plant, a plant having altered characteristics; and starch, particularly starch obtained from a potato plant, having novel properties.
Claims68
Starch extracted from a potato plant and having an amylose content of at least 35%, as judged by the iodometric assay method of Morrison & Laignelet (1983 J. Cereal Science 1, 9-20).
Starch which as extracted from a potato plant by wet milling at ambient temperature has a viscosity onset temperature in the range 70-95° C., as judged by viscoamylograph of a 10% w/w aqueous suspension thereof, performed at atmospheric pressure using the Newport Scientific Rapid Visco Analyser 3C with a heating profile of holding at 50° C. for 2 minutes, heating from 50 to 95° C. at a rate of 1.5° C. per minute, holding at 95° C. for 15 minutes, cooling from 95 to 50° C. at a rate of 1.5° C. per minute, and then holding at 50° C. for 15 minutes.
Starch which as extracted from a potato plant, has a phosphorus content in excess of 200 mg/100 grams dry weight starch.
A nucleotide sequence encoding an effective portion of a class A starch branching enzyme (SBE) obtainable from potato plants.
A potato plant or part thereof which, in its wild type possesses an effective SBE A gene, but which plant has been altered such that there is no effective expression of an SBE A polypeptide within the cells of at least part of the plant.
Dependencies are inferred from the claim text.