ChEBI: Thioproline is a sulfur-containing amino acid that is proline in which the methylene group at position 4 is replaced by a sulfur atom. It has a role as a hepatoprotective agent, an antioxidant and an antidote. It is a sulfur-containing amino acid, a thiazolidinemonocarboxylic acid and a non-proteinogenic alpha-amino acid. It is a tautomer of a thioproline zwitterion.
