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