| Compound | Description |
|---|
| diphosphoric acid | |
| hydronium ion | |
| Ammonium | |
| 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) |
| uracil | One of four nucleotide bases in the nucleic acid RNA. |
| cytosine | A pyrimidine base that is a fundamental unit of nucleic acids. |
| Uridine Monophosphate | 5'-Uridylic acid. A uracil nucleotide containing one phosphate group esterified to the sugar moiety in the 2', 3' or 5' position. |