11. In the more specific enzymatic methods, the enzyme urease converts urea to ammonia and carbonic acid. 12. Among other virulence-related enzymes, " T . tonsurans " also produces urease . 13. It is a nongastric urease -negative " Helicobacter " species colonizing the lower bowel. 14. Urease activity tends to increase the pH of its environment as it produces ammonia, a basic molecule.15. In this case the enzyme urease is used to catalyze the hydrolysis of urea into carbon dioxide and ammonia. 16. One puzzle for scientists has been to determine how the enzyme, urease , can itself survive all that acidity. 17. Bacterial overgrowth may cause false positive H . Pylori test results due to the change in pH from urease activity. 18. :Our article on Nickel states that it's part of urease , so the body would need nickel. 19. For this reason " C . ensiformis " has been investigated as a potential source of the urease enzyme. 20. Making urease more vulnerable to stomach acid, for example, would mean less ammonia, and thus less protection for the bacteria.
