Cysteine

Chemical Information
L-cysteine is an optically active form of cysteine having L-configuration. It has a role as a flour treatment agent, an EC 4.3.1.3 (histidine ammonia-lyase) inhibitor and a human metabolite. It is a cysteine, a L-alpha-amino acid, a serine family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-cysteinium. It is a conjugate acid of a L-cysteinate(1-). It is an enantiomer of a D-cysteine. It is a tautomer of a L-cysteine zwitterion.
| CAS Number | 52-90-4 |
| PubChem CID | 5862 |
| IUPAC Name | (2R)-2-amino-3-sulfanylpropanoic acid |
| Molecular Formula | C3H7NO2S |
| Molecular Weight | 121.16 |
| XLogP | -2.5 |
| Topological Polar Surface Area | 64.3 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 2 |
| Heavy Atom Count | 7 |
| Formal Charge | 0 |
| Complexity | 75 |
| Property | Value |
|---|---|
| Molecular Weight | 121.16 |
| XLogP3 | -2.5 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 2 |
| Exact Mass | 121.01974964 |
| Monoisotopic Mass | 121.01974964 |
| Topological Polar Surface Area | 64.3 Ų |
| Heavy Atom Count | 7 |
| Formal Charge | 0 |
| Complexity | 75.3 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 1 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
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