3543174 MTHFR methylenetetrahydrofolate reductase 4730 3543180 MTHFR Methylenetetrahydrafolate Reductase Gene Polymorphism 4 3543187 MTHFR MTHFR-reductase 2 3543186 MTHFR 5,10-methylenetetrahydrofolate reductase (one of the key folate/Hcy pathway enzymes) gene 1 3543189 MTHFR 5-methylene tetrahydrofolate by methylenetetrahydrofolate reductase 1 3543191 MTHFR 5-methyltetrahydrofolate-homocysteine methyltransferase or 5,10-methylenetetrahydrofolate reductase 1 3543190 MTHFR METHODS: Ten polymorphisms, methylenetetrahydrofolate reductase 1 3543176 MTHFR methyl-tetra-hydrofolic acid 1 3543179 MTHFR methylation levels of genes involved in one-carbon metabolism 1 3543178 MTHFR methylenetetrahydrofolate dehydrogenases 1 3543177 MTHFR methylenetetrahydrofolate NAD(P)H 1 3543183 MTHFR mild HHcy is methylenetetrahydrofolate reductase 1 3543181 MTHFR more significant differences of the levels of thiols: Hcy 1 3543188 MTHFR MTX-related toxicity and 5,10-methylenetetrahydrofolate reductase 1 3543182 MTHFR multiple factors including the C677T polymorphism on 5.10-methylenetetrahydrofolate reductase 1 3543184 MTHFR mutation, the 5,10-methylenetetrahydrofolate-reductase 1