Catabolism

Deamination

The amino group is removed from protein molecules, the amino group is then converted to ammonia which is waste excreted as urine

protein catabolism

remaining amino acid groups are converted into molecules that can be utilized in cellular respiration

* pyruvate
* acetyl-CoA
* 4/5-carbon intermediate in the Krebs cycle

Lipid catabolism

triglycerides are broken down into glycerol and fatty acid chains

* Glycerol is converted into G3P/PGAL through **gluconeogenesis**
* Fatty acids are transported to the mitochondria to undergo **B-oxidation**
* yields Acetyl-CoA

Gluconeogenesis

B-Oxidation

The removal of fatty acid chains, broken down into two carbon molecules, added to CoA