Liver: mitochondria, then cytosol
Urea cycle mnemonics
Two nitrogens in, one urea out.
Word by word
| Step | Word | Stands for | Enzyme word | Enzyme |
|---|---|---|---|---|
| 1 | Careless | Carbamoyl phosphate | Carbamoyl phosphate synthetase I | |
| 2 | Crappers | Citrulline | Ornithine transcarbamoylase | |
| 3 | Also | Argininosuccinate | Argininosuccinate synthetase | |
| 4 | Frivolous / About | Arginine + Fumarate | Argininosuccinate lyase | |
| 5 | Urination | Urea + Ornithine | Arginase |
A mnemonic only sticks once you have used it. The quiz and the rebuild below both draw on these exact steps.