Structure of adenosine triphosphate (ATP), a central intermediate in energy metabolism

 

 

Glucose can exist in both a straight-chain and ring form.

 

Structure of the coenzyme acetyl-CoA.The transferable acetyl group is bonded to the sulfur atom at the extreme left.

 

 

Structure of hemoglobin. The protein subunits are in red and blue, and the iron-containing heme groups in green. From PDB 1GZX.

 

 

 

A simplified outline of the catabolism of proteins, carbohydrates and fats