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In the field of enzymology, a betaine-homocysteine S-methyltransferase also known as betaine-homocysteine methyltransferase (BHMT) is a zinc metallo-enzyme that catalyzes the transfer of a methyl group from trimethylglycine and a hydrogen ion from homocysteine to produce dimethylglycine and methionine respectively: [2]
In enzymology, a homocysteine S-methyltransferase (EC 2.1.1.10) is an enzyme that catalyzes the chemical reaction. S-methylmethionine + L-homocysteine 2 L-methionine. Thus, the two substrates of this enzyme are S-methylmethionine and L-homocysteine, and it produces 2 molecules of L-methionine.
Sarcosine/dimethylglycine N-methyltransferase (EC 2.1.1.157, ApDMT, sarcosine-dimethylglycine methyltransferase, SDMT, sarcosine dimethylglycine N-methyltransferase, S-adenosyl-L-methionine:N,N-dimethylglycine N-methyltransferase) is an enzyme with systematic name S-adenosyl-L-methionine:sarcosine(or N,N-dimethylglycine) N-methyltransferase (N,N-dimethylglycine(or betaine)-forming).
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In humans it is encoded by the MTR gene (5-methyltetrahydrofolate-homocysteine methyltransferase). [ 5 ] [ 6 ] Methionine synthase forms part of the S-adenosylmethionine (SAMe) biosynthesis and regeneration cycle, [ 7 ] and is the enzyme responsible for linking the cycle to one-carbon metabolism via the folate cycle.
Dimethylglycine N-methyltransferase (EC 2.1.1.161, BsmB, DMT) is an enzyme with systematic name S-adenosyl-L-methionine:N,N-dimethylglycine N-methyltransferase (betaine-forming). [1] This enzyme catalyses the following chemical reaction
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Levomefolic acid (INN, also known as L-5-MTHF, L-methylfolate and L-5-methyltetrahydrofolate and (6S)-5-methyltetrahydrofolate, and (6S)-5-MTHF) is the primary biologically active form of folate used at the cellular level for DNA reproduction, the cysteine cycle and the regulation of homocysteine.