Vitamin B12 - Methylcobalamin

Cobalamin is derived only from animal foodstuffs. After absorption it is transported in the blood as the protein transcobalamin. There are two activated coenzymes derived from cobalamin; Adenosylcobalamin and Methylcobalamin. Methylcobalamin (delete which) is used as a methyl carrier to recycle homocysteine back to methionine by the methionine synthetase pathway. Methylcobalamin obtains its methyl group from methyl tetrahydrofolate.

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