I am studying a method of finding the ratio between amylose and amylopectin using the difference in color of the amylose-iodine complex(blue) and the amylopectin-iodine complex (red/brown).
Through the use of techniques like x-ray crystallography, the structure of the amylose-iodine complex seems to be fairly well understood, as iodine inside a helical chain of amylose.
However, I cannot find many papers that explicitly claim the structure of the amylopectin-iodine complex. Perhaps the branched nature makes it more complex, or the variety in structure unlike amylose makes it impossible to find a general structure.
Are we aware of any certain structure of the amylopectin iodine complex? Any directions to relevant papers would be appreciated.