Mannose-6-phosphate

Is there a possibility that the enzymes are specialized only for utilizing α-D-glucose and not its epimers like mannose,etc.? Is the reason for us being composed of L-amino acids similar to the reason for α-D-glucose to form glycogen and not cellulose (ie because of it's ability ...

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this is rather question, why did glucose become the main energy source and not e.g. mannose. That's similar to the question, why are we composed from L-amino acids ;)

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... --Acarbose --Stachyose --Glucan --Glycogen --Amylose --Amylopectin --Zymosan --Lentinan --Suzofiran --Maltodextrin --Fructan --Inulin --Levans --Mannose --Mannan --Chitin --Fructooligosaccharide --Galacto-oligosaccharide --Mannan-oligosaccharide An answer in the format of this: (just an example) ...

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... many sugars for signaling purposes: either glycoproteins or proteoglycans. For example: Secretory vesicles in the Golgi cisterna use mostly mannose, galactose, and NAG (N-Acetlyglucosamine) to make the necessary glycoproteins for export. Oh, and all those glycoproteins and glucosamines in ...

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Monosaccharides means just one molecular of sugar. Thus take your pick of glucose, lactose, galactose, mannose, xylitose, for the six carbon sugar, but there is also the five carbon sugar fructose. define simplest.

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