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.
Vitamin B-12 is necessary for production of the amino acid methionine, which is converted into S-adenosylmethionine, or SAMe, a compound sometimes used in the treatment of liver disease. Other good dietary sources of vitamin B-12 include clams, salmon, chicken, eggs and milk.et, these organs account for 60 percent of the energy your body consumes when you are at rest, according to the book Principles of Clinical Gastroenterology.. To keep you liver functioning efficiently, it needs a good supply of B-complex vitamins to assist it with the breakdown of carbohydrates, fats and proteins.