methionine /me·thi·o·nine/ (Met) (M) (mĕ-thi´ŏ-nēn) a naturally occurring, essential amino acid that furnishes both methyl groups and sulfur necessary for normal metabolism. Labeled with carbon 11, it is used in positron emission tomography for detection of neoplasms.
methionine (Met) 
methionine
me·thi·o·nine (m -th  -n n )n. Abbr. Met A sulfur-containing essential amino acid obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals. |
methionine (Met)
[methī′ənēn]
an essential amino acid needed for proper growth in infants and for maintenance of nitrogen balance in adults. It is a source for methyl groups and sulfur in the body. It is also administered as adjunctive treatment in liver diseases. See also amino acid, protein.
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Chemical structure of methionine
methionine
thī´methionine
Met; a sulfur-containing amino acid occurring in proteins, which is an essential component of the diet of animals.
methionine deficiency
exacerbates deficiencies of choline and vitamin B12.
methionine enkephalin
met-enkephalin; see enkephalin.
methionine sulfoximine
the convulsant agent produced in flour by the agene process. Causes hysteria in dogs, ferrets, rabbits and cats, but other species are not affected.
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