Membrane Structure and Function
Peptidoglycan is a complex consisting of

polysaccharide and protein
mono-saccharide and protein
aminoacid and carbohydrate
oligo-saccharide and protein

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Membrane Structure and Function
The membrane proteins that catalyze active transport reactions differ from soluble enzymes as

they do not enhance the rates of reaction
the substrates of the reaction are all outside the cell
the products of the reaction move in a specific direction
they are permanently changed during the reaction

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