| Compound | Description |
|---|
| diphosphoric acid | |
| hydronium ion | |
| uridine diphosphate | A uracil nucleotide containing a pyrophosphate group esterified to C5 of the sugar moiety. |
| Orthophosphate | |
| Magnesium | A metallic element that has the atomic symbol Mg, atomic number 12, and atomic weight 24.31. It is important for the activity of many enzymes, especially those involved in OXIDATIVE PHOSPHORYLATION. |
| Water | A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) |
| Cytidine Triphosphate | Cytidine 5'-(tetrahydrogen triphosphate). A cytosine nucleotide containing three phosphate groups esterified to the sugar moiety. |