title: Nitrous oxide, vitamin B12 deficiency and the methyl folate trap.
mesh_terms: D013766:5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase / Q000037:antagonists & inhibitors; D000749:Anemia, Megaloblastic / Q000139:chemically induced; D000818:Animals; D006801:Humans; D008099:Liver / Q000378:metabolism; D008252:Macaca fascicularis; D008715:Methionine / Q000172:deficiency; D008765:Methylmalonyl-CoA Mutase / Q000037:antagonists & inhibitors; D009422:Nervous System Diseases / Q000209:etiology; D009609:Nitrous Oxide / Q000009:adverse effects*; D051381:Rats; D012435:S-Adenosylhomocysteine / Q000378:metabolism; D012436:S-Adenosylmethionine / Q000378:metabolism; D013763:Tetrahydrofolates / Q000378:metabolism*; D014806:Vitamin B 12 Deficiency / Q000139:chemically induced*
chemical_list: D013763:Tetrahydrofolates; D012436:S-Adenosylmethionine; D012435:S-Adenosylhomocysteine; D008715:Methionine; D013766:5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase; D008765:Methylmalonyl-CoA Mutase; D009609:Nitrous Oxide; C005984:5-methyltetrahydrofolate