Glycogen biological oxidation

Next, let us take a look at the overall picture of the biological oxidation of carbohydrates. We start with glycogen ( sugar-former ) the form in which carbohydrates are stored in the animal body. This, we have seen (Sec. 35.9), is a starch-like polymer of D-glucose,... 

To figure out the biological meaning of the crossover (Figure 2.9 (C-E)), we need to know why this occurs. In mammals the answer seems to be a simple conseqence of power obtainable from different metabolic pathways maximum ATP turnover rates supported by fat oxidation in mammals are only about two-thirds the maximum ATP turnover rates supportable by glycogen oxidation (figure 2.10). The reasons for... 

Both the routes mentioned earlier pertain to cell metabolism, which broadly speaking cormotes any biologically inspired reaction sequence. Most usually, however, the term applies to oxidative or exothermic reaction sequences involving energy sources such as glucose or glycogen, and the expression of primary metabolism is more definitive, as distinguished from secondary metabolism. 

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