Page 7 - Biochemistry2 (08PB403)
P. 7
How is metabolism regulated?
Two broad classes of pathways
• Catabolic – break down molecules to generate energy
• Anabolic - require energy for synthesis of molecules
The two pathways are kept distinct by regulatory
mechanisms and/or sequestration in different cell
compartments.
Pathways contain recurring enzymatic mechanisms
• Oxidation-reduction reactions.
• Isomerization reactions.
• Group transfer reactions.
• Hydrolytic reactions.
• Addition or removal of functional groups.
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