Research Article

Plasma and Red Cell Reference Intervals of 5-Methyltetrahydrofolate of Healthy Adults in Whom Biochemical Functional Deficiencies of Folate and Vitamin B12 Had Been Excluded

Figure 1

Homocysteine, folate, and vitamin B12 metabolism. THF (tetrahydrofolate), 5-MTHF (5-methyltetrahydrofolate), MTHFR (methylene tetrahydrofolate reductase), MS (methionine synthase), CBS (cystathionine beta-synthase), SAM (S-adenosyl methionine), Cbl (cobalamin), TC II (transcobalamin), holo TC (holotrascobalamin), OH-Cbl (hydroxocobalamin), MMA-CoA (methylmalonyl-CoA), and MMA (methylmalonic acid).
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