Methionine
  • CAS Number 63-68-3
  • Catalog Number io-39977
  • Classification Salts
  • Molecular Weight 149.2100
  • SMILES CSCCC(C(=O)O)N
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L-methionine is the L-enantiomer of methionine. It has a role as a nutraceutical, a micronutrient, an antidote to paracetamol poisoning, a human metabolite and a mouse metabolite. It is an aspartate family amino acid, a proteinogenic amino acid, a methionine and a L-alpha-amino acid. It is a conjugate base of a L-methioninium. It is a conjugate acid of a L-methioninate. It is an enantiomer of a D-methionine. It is a tautomer of a L-methionine zwitterion.

1 L-methionine
2 methionine
3 h-Met-oh
4 (S)-2-Amino-4-(methylthio)butanoic acid
5 Cymethion
Molecular Formula C5H11NO2S
Canonical SMILES CSCCC(C(=O)O)N
Isomeric SMILES CSCC[C@@H](C(=O)O)N
Molecular Weight 149.2100
InChIKey FFEARJCKVFRZRR-BYPYZUCNSA-N
InChI InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1
XLogP -1.9000
ExactMass 149.0510
MonoisotopicMass 149.0510
TPSA 88.6000
Complexity 97.0000
Charge 0.0000
HBondDonorCount 2
HBondAcceptorCount 4
RotatableBondCount 4
HeavyAtomCount 9
IsotopeAtomCount 0
AtomStereoCount 1
DefinedAtomStereoCount 1
UndefinedAtomStereoCount 0
BondStereoCount 0
DefinedBondStereoCount 0
UndefinedBondStereoCount 0
CovalentUnitCount 1
PatentCount 48869
PatentFamilyCount 20332
LiteratureCount 35407