Changes in Some Properties of Starch Granules of Maize Having Amylose-extender Gene by Amylase Attack

作者: Yoshiko I Kawa , Hidetsugu Fuwa

DOI: 10.1002/STAR.19800320502

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摘要: Properties of residual starch by glucoamylase attack were investigated in granules maize (Zea mays L.) amylose-extender (ae) type (commercial “High Amylose-7”; HA-7). As increasing extent hydrolysis, the amylose and amylopectin fractions decreased low-molecular-weight materials accumulated. Decrease absorption intensity sift to a range shorter wavelength γmax. spectra iodine-starch complexes observed. The minified had peak about 22 average glucose-units nearly linear chains. It was suggested that consisted portion resisted amylases according hydrolysis curves glucoamylase. concerned crystalline area ae from X-ray diffraction patterns. Anderungen einiger Eigenschaften der Starkekorner von Amyloseextender-Gen enthaltendem Mais durch Amylaseangriff. Die nach Glucoamylaseangriff auf des Amyloseextender-(ae)-Typs wurden untersucht. Mit zunehmendem Ausmas Hydrolyse verringerten sich die Amylose- und Amylopektinfraktionen, Substanzen mit niedrigem Molekulargewicht sammelten an. Eine Verringerung Absorptionsintensitat eine Verschiebung einem Bereich kurzerer Wellenlange Absorptionsspektrums Iodstarke-Komplexe beobachtet. verkleinerten Fraktionen hatten Spitze Glucoseeinheiten waren nahezu lineare Ketten. Es wird vermutet, das aus Anteilen Starke bestehen, den Amylasen widerstehen. zu kristallinen Bereichen ae-Starke gehorenden ihrem Rontgenbeugungs-Verhalten ermittelt.

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