Proline
Amino acid
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Proline is an organic acid classed as a proteinogenic amino acid, although it does not contain the amino group -NH
₂ but is rather a secondary amine. The secondary amine nitrogen is in the protonated form under biological conditions, while the... Wikipedia
Formula: C₅H₉NO₂
Molar mass: 115.13 g/mol
3D model (JSmol): L: Interactive image; L Zwitterion: Interactive image
Acidity (pKa): 1.99 (carboxyl), 10.96 (amino)
Appearance: Transparent crystals
Beilstein Reference: 80812
Gmelin Reference: 26927