- Once you break down these amino acids, you get a group of metabolites that are formed
- 7 Carbon skeleton metabolites: pyruvate, acetyl CoA, acetoacetyl CoA, alpha-ketoglutarate, succinyl CoA, Fumarate, Oxaloacetate
- Anabolic precursors
- Energy production
> Glucose

> Acetyl CoA

> TCA Cycle intermediates

- Liver likes to break down carbon skeletons
> We can use catabolism to yield energy

> Can be used as Anabolic precursors 

> Available for ketone body generation or made into glucose

> Some are ketogenic, glucogenic, or both (ketone bodies or glucose)


Use of carbon skeletons

Carbohydrates can be categorized into four pertinent groups:
- monosaccharides
- disaccharides
- oligosaccharides
- polysaccharides

Diversity of Carbohydrates

Carbohydrates are macromolecules that are composed of carbon, hydrogen, and oxygen in the ratio C:2H:0.  

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There are many types of macromolecules such as: 

- carbohydrates
- lipids
- proteins
- nucleic acids

Types of Macromolecules

https://www.khanacademy.org/science/biology/macromolecules

Macromolecules

Wikipedia

Carbohydrates

Lipids are macromolecules that are composed of carbon, hydrogen, and oxygen.  Lipids are typically hydrophobic, nonpolar, and composed of hydrocarbon chains.  

Lipids

Proteins are macromolecules that are composed of subunits called amino acids When the number of amino acids linked together becomes very large, or when multiple polypeptides are used as building subunits,

Proteins

Nucleic acids are macromolecules that are composed of subunits called nucleotides.  They are responsible for the transfer of genetic information from an organism's genome and turning it into proteins.  Nucleic acids exist in two forms:

- deoxyribonucleic acid (DNA)
- ribonucleicacid (RNA)

Nucleic acids are built using nitrogen, and thus need a nitrogen source to undergo nitrogen fixation

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