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Every compound in the sci-wiki that affects dna synthesis; the ones you can source are floated to the front, then the reference-only entries. Tap any for the full entry, mechanism, and outlets.
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Cyanocobalamin is a manufactured form of vitamin B12, an essential cobalt-containing nutrient, and is widely used to treat and prevent B12 deficiency along with the anemia and neurological problems it can cause. Because it is the most stable and easily purified cobalamin, it is the form most often added to supplements, fortified foods, and injectable and oral medicines. In the body it is not directly active; cells must strip off its cyanide group and convert it into the working forms methylcobalamin and adenosylcobalamin.
Leucovorin calcium, also called folinic acid, is the calcium salt of a reduced, biologically active form of folate (vitamin B9). Unlike ordinary folic acid, it does not need to be activated by the enzyme dihydrofolate reductase before cells can use it. In medicine it is given mainly to counter the toxicity of the chemotherapy drug methotrexate and to strengthen the effect of fluorouracil in treating certain cancers.