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    I'm supposed to draw Hayworth's formula for disaccharide of
    a) cellulose---- cellobiose
    b) amylose-----maltose
    c0 amylopectine-----maltose and isomaltose
    and
    d) glycogen -----???????

    I'm having trouble finding a disaccharide for glycogen. Any help ???
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    The way I recommend students to remember which isotope of glucose (coming to disaccharides in a sec) is present in various polysaccharides, is to remember the polysaccarides in the following order:

    Amylose
    Amylopectin
    Glycogen
    Cellulose

    Mnemonic: Amy and Andy are Good Chums!

    and the corresponding glucose isotopes being: alpha, beta, alpha, beta in that order. i.e. amylose: alpha; amylopectin: beta, glycogen: alpha; cellulose: beta. (the human hippocampus has a predilection to more readily permit storage and subsequent retrieval of info in certain specific formats, one of them being symmetry/order/sequence - you will be very aware of how you start thinking of the next song/tune in your collection as soon as the previous one is about to end, when you have listened to that album a few times - same principle).

    So, if glycogen contains alpha glucose, and you know that glycogen is highly branched (has both 1, 4 and 1, 6 linkages), you can work out the disaccharides that comprise the intermediaries in the process of glycogenolysis (breakdown of glycogen into alpha glucose)

    Hope this helps!
    Mukesh
 
 
 
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