What is methionine?

  • (noun): A crystalline amino acid containing sulfur; found in most proteins and essential for nutrition.

Methionine

Methionine ( /mɛˈθaɪ.ɵniːn/ or /mɛˈθaɪ.ɵnɪn/; abbreviated as Met or M) is an α-amino acid with the chemical formula HO2CCH(NH2)CH2CH2SCH3. This essential amino acid is classified as nonpolar. This amino-acid is coded by the codon AUG, also known as the initiation codon, since it indicates mRNA's coding region where translation into protein begins.

Read more about Methionine.

Some articles on methionine:

Sulfur Metabolism - Sulfur Use By Plants and Animals
... From the sulfide they form the amino acids cysteine and methionine, sulfur lipids, and other sulfur compounds ... Animals obtain sulfur from cysteine and methionine in the protein that they consume ... The amino acids cysteine and methionine are used by the body to make glutathione ...
Lipoyl Synthase
... N6-(octanoyl)lysine + 2 sulfur + 2 S-adenosyl-L-methionine protein N6-(lipoyl)lysine + 2 L-methionine + 2 5'-deoxyadenosine The 3 substrates of this enzyme are ...
L-methionine (R)-S-oxide Reductase
... In enzymology, a L-methionine (R)-S-oxide reductase (EC 1.8.4.14) is an enzyme that catalyzes the chemical reaction L-methionine + thioredoxin disulfide + H2O L-methionine (R)-S-ox ... in common use include fRMsr, FRMsr, free met-R-(o) reductase, and free-methionine (R)-S-oxide reductase ... This enzyme participates in methionine metabolism ...
Coproporphyrinogen Dehydrogenase
... the chemical reaction coproporphyrinogen III + 2 S-adenosyl-L-methionine protoporphyrinogen IX + 2 CO2 + 2 L-methionine + 2 5'-deoxyadenosine Thus, the two substrates of this enzyme are coproporphyrinogen III and S-ad ... systematic name of this enzyme class is coproporphyrinogen-IIIS-adenosyl-L-methionine oxidoreductase (decarboxylating) ...
Methionine - Other Uses
... DL-methionine is sometimes given as a supplement to dogs it helps keep dogs from damaging grass by reducing the pH of the urine ... Methionine is allowed as a supplement to organic poultry feed under the US certified organic program ...