D-Methionine sulfoxide

• CAT Number: I017571
• CAS Number: 21056-56-4
• Molecular Formula: C5H11NO3S
• Molecular Weight: 165.21
• Purity: ≥95%
• Synonyms: (2R)-2-amino-4-methylsulfinylbutanoic acid
• InChI: InChI=1S/C5H11NO3S/c1-10(9)3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-,10?/m1/s1
• InChIKey: QEFRNWWLZKMPFJ-CQIZIWTCSA-N
• SMILES: CS(=O)CCC(C(=O)O)N

D-Methionine sulfoxide(CAT: I017571) is the D-isomer of methionine sulfoxide, an oxidation product of the essential amino acid methionine. Formed during oxidative stress or food processing, it serves as a biomarker for protein oxidation and redox regulation. Methionine, a sulfur-containing amino acid, is nutritionally significant as the limiting amino acid in milk, leguminous proteins, and poultry diets, and is prone to oxidative modification. D-Methionine sulfoxide is widely studied in protein chemistry, food science, and oxidative biology for its role in amino acid stability, antioxidant defense, and enzymatic reduction by methionine sulfoxide reductases in maintaining cellular redox homeostasis.