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.
Help prevent the long-lasting effects of vitamin B-12 deficiency by eating food sources of the nutrient, such as eggs and meat.Vitamin B-12, or cobalamin, makes up a part of the B vitamin family. It has a number of biological functions in your body, playing roles in healthy circulation and a functional nervous system.hile some symptoms of vitamin B-12 deficiency are easily reversed by boosting your intake of the vitamin, other symptoms can stay even long after your B-12 levels have returned to normal.