1. This gene is a member of the cytidine deaminase gene family. 2. The recommended name assigned by the IUBMB is cytidine deaminase . 3. This gene is a member of the polynucleotide cytosine deaminase gene family. 4. Porphobilinogen deaminase is involved in the third step of the heme biosynthetic pathway. 5. Porphobilinogen deaminase usually exists in dimer units in the cytoplasm of the cell. 6. This enzyme is also called "'adenosylhomocysteine deaminase " '. 7. Elo made her notable discovery of Adenosine Deaminase and Immune Deficiency in 1972. 8. Nucleic acid amplification tests and adenosine deaminase testing may allow rapid diagnosis of TB. 9. Some mutations in the gene for adenosine deaminase cause it not to be expressed. 10. Interestingly, CD2 is unable to exert deaminase activity without the presence of CD1.