| Compound | Description |
|---|
| hydronium ion | |
| aminolevulinic acid | A compound produced from succinyl-CoA and GLYCINE as an intermediate in heme synthesis. It is used as a PHOTOCHEMOTHERAPY for actinic KERATOSIS. |
| ammonium hydroxide | The hydroxy salt of ammonium ion. It is formed when AMMONIA reacts with water molecules in solution. |
| Iron | A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN. |
| Carbon Dioxide | A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals. |
| 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) |
| Oxygen | An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. |
| porphobilinogen | |
| uroporphyrinogen iii | |
| protoporphyrinogen | |
| coproporphyrinogen iii | |
| protoporphyrin ix | RN given refers to parent cpd; structure in Merck Index, 9th ed, #7685 |
| hydroxymethylbilane | tetrapyrrole intermediate in pigment biosynthesis by Euglena gracilis; universal intermediate in biosynthesis of uroporphyrinogen III; structure given in first source |