L-Methionine (met) is an essential amino acid and is required for a number of important cellular functions, including the initiation of protein synthesis, the methylation of DNA, RNA and xenobiotics, and the biosynthesis of cysteine, phospholipids and polyamines.
Chemical Formula:

• Empirical Formula: C₅H₁₁NO₂S
• Molecular Weight: 149.21 daltons
• Smiles: C(=O)([O-])C([N+]) CCSC
• InChi: InChI=1S/C₅H₁₁NO₂S/C1-9-3-2-4 (6) 5 (7)8  / H4H, 2-3 ,6H2, 1H3, (H, 7 ,8)
• Cas No: 63-68-3

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