Glycogen molecular weight

Glycogen synthase of Hymenolepis diminuta. II. Nutritional state, interconversion of forms, and primer glycogen molecular weight as control factors. Journal of Parasitology, 65 25-30. 

The effect of alkali treatment on molecular weight (compare with the case of the starch components) has been studied treating a 5% solution of rabbit-liver glycogen in 2 N sodium hydroxide, for 90 minutes at 100°, decreased the sedimentation constant (Sits X 1013) from 86 to 57 (that is, by 34%).237... 

In comparison with a pullulanase, the purified amylopullulanase displayed 3-fold higher specificity towards soluble starch and amylopectin and 7-fold higher specificity towards glycogen (12). The amylopullulanase hydrolyzed various high molecular weight starch substrates (Table II). Even the mammalian glycogen which... 

Glycogen, animal starch, is similar to amylopectin, but it features more branching and tends to have a higher molecular weight. Glycogen occurs in the liver and muscle tissue. It interacts with iodine to produce a red color. 

Fig. 33. Experimentally observed molecular-weight dependence of (S2)z for amylose chains grafted onto glycogen (filled circles) and partially debranched amylopectin (open circles). Grafting was achieved by potato phosphorylase (15 rays for glycogen and 12000 per amylopectin molecule), and by muscle phosphorylase (400 rays per glycogen molecule)142,143)...

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