Vitamin B 12: A cobalt-containing coordination compound produced by intestinal micro-organisms and found also in soil and water. Higher plants do not concentrate vitamin B 12 from the soil and so are a poor source of the substance as compared with animal tissues.

Synonym: eritron, cyanocobalamin, cobalamin.

Terms Related to Vitamin B 12

• Vitamin K

  A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (VITAMIN K 1) ...

• Vitamin B12 Deficiency

  A nutritional condition produced by a deficiency of VITAMIN B 12 in the diet, characterized by megaloblastic anemia. Since vitamin B 12 is not present ...

• Vitamin A Deficiency

  A nutritional condition produced by a deficiency of VITAMIN A in the diet, characterized by NIGHT BLINDNESS and other ocular manifestations such as dryness of ...

• Vitamin K 2

  A group of substances similar to VITAMIN K 1 which contains a ring of 2-methyl-1,4-naphthoquinione and an isoprenoid side chain of varying number of isoprene ...

• Vitamin D Deficiency

  A nutritional condition produced by a deficiency of VITAMIN D in the diet, insufficient production of vitamin D in the skin, inadequate absorption of vitamin ...

• Vitamin K 1

  A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only ...

• Algae

  A major group of lower plants that comprises, usually, photosynthetic plants of extremely varied morphology and physiology, and that is commonly considered to be a ...

• Menaquinone

  A group of substances similar to VITAMIN K 1 which contains a ring of 2-methyl-1,4-naphthoquinione and an isoprenoid side chain of varying number of isoprene ...

• Vitamin B 12 Binder

  A group of carrier proteins which bind with vitamin B12 in the blood and aid in its transport. Transcobalamin I migrates electrophoretically as a beta-globulin, ...

• Aquamephyton

  A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only ...