Limit dextrins from glycogen with phosphorylase

That this interpretation of the action of phosphorylase and the debranching enzyme is incorrect came later from the work of Walker and Whelan. They examined the structure of the limit dextrin prepared by the action of highly purified, muscle phosphorylase on amylopectin. Debranching of this dextrin by R-enzyme resulted in production of malto-tetraose. (Similar results were later obtained when glycogen -dextrin was debranched with pullulanase. ) It was therefore concluded that the unequal attenuation of the two chains by phosphorylase, proposed... 

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