Cysteine (also called L-cysteine, Cystein) has the formula C3H7NO2S and a molar mass of 121.16 g/mol. The model above is PubChem's computed 3D conformer: drag to rotate, scroll to zoom, and use the measurement tools to read bond lengths and angles.
Explore in 3D Space-filling model PubChem
| IUPAC name | (2R)-2-amino-3-sulfanylpropanoic acid |
|---|---|
| SMILES | C([C@@H](C(=O)O)N)S |
| PubChem CID | 5862 |
| Other names | L-cysteine, Cystein, Thioserine, Half-cystine, beta-Mercaptoalanine |
Atoms use the standard CPK colors: carbon gray, hydrogen white, oxygen red, nitrogen blue, sulfur yellow. Switch to Spacefill to see the molecule's overall shape and size, or Stick for a clear view of the bonds. Click two atoms in distance mode to measure a bond length in ångströms.
3D coordinates are PubChem's computed conformer, one low-energy shape of the molecule. Flexible molecules can take many other shapes.