They fix nitrogen from dinitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment.
Vitamin B12 is an especially important vitamin for maintaining healthy nerve cells, and it helps in the production of DNA and RNA, the body's genetic material. Vitamin B12 works closely with vitamin B9, also called folate or folic acid, to help make red blood cells and to help iron work better in the body.
â Mayo Clinic experts routinely recommend that older adults consider B-12 supplements or food fortified with this critical vitamin. The September issue of Mayo Clinic Health Letter covers the importance of vitamin B-12, problems associated with vitamin B-12 deficiency and how this condition can be avoided.Vitamin B-12 plays a role in red blood cell formation, cell metabolism, nerve function and bone health.A deficiency of vitamin B-12 can be associated with tingling or prickly feelings in legs or hands, difficulty walking, forgetfulness, changes in personality, weakness and anemia (shortage of red blood cells).he September issue of Mayo Clinic Health Letter covers the importance of vitamin B-12, problems associated with vitamin B-12 deficiency and how this condition can be avoided.