Ultrafine Structure of Glycogen Macromolecules in Mammalian Tissues

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Abstract
The ultrafine structure of histochemically synthesized glycogen in vitro in the tissue-cells apparently was morphologically demonstrated as a spherical branching body which was composed of 6–10 large branches with a number of smaller branches and it presumably was a structure of glycogen macromolecule itself. This ultrafine structure was more clearly shown than the image of spherical branching body of glycogen obtained by the ultracentrifugation and purification procedures, although both were quite similar in structure. It was suggested that the size of glycogen macromolecules may be changeable under the metabolic conditions that are influenced by the kind of tissue-cells and intracytoplasmic enzymes.

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