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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