| 1 | This serine biosynthesis has been demonstrated in mitochondrial preparation. | |
| 2 | Phosphatidylserine is a substance that regulates the stress hormone cortisol. | |
| 3 | Inhibits also most of other mammalian serine proteases but at a lower rate. | |
| 4 | Choline assists detoxification reactions in the liver. Although choline can be synthesized from methionine or serine, recent evidence indicates that choline is an essential nutrient. | |
| 5 | Irreversibly inhibits serine proteases by sulfonylation of the serine residue in the active site of the protease. |