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2-[3-(2-Thioxopyrrolidin-3-ylidene)methyll-tryptophan, a novel yellow pigment in salted radish roots.
- Source :
-
Bioscience, biotechnology, and biochemistry [Biosci Biotechnol Biochem] 2002 Jul; Vol. 66 (7), pp. 1450-4. - Publication Year :
- 2002
-
Abstract
- The structure of the yellow pigment found in salted radish roots was studied. It was found that 1-(2-thioxopyrrolidin-3-yl)-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (TPCC) was unstable under neutral pH, and was easily converted into the yellow pigment. The yellow pigment was isolated and identified as 2-[3-(2-thioxopyrrolidin-3-ylidene)methyl]-tryptophan (TPMT) by IR, MS, 1H-, and 13C-NMR spectroscopy. In addition, we proved that this compound was the main yellow pigment in salted radish roots. This compound induced no mutagenicity in Salmonella typhimurium TA98 and TA100, either with or without prior activation.
- Subjects :
- Animals
Cellulose chemistry
Chromatography, Liquid
Hydrogen-Ion Concentration
In Vitro Techniques
Magnetic Resonance Spectroscopy
Mass Spectrometry
Models, Molecular
Molecular Conformation
Mutagenicity Tests
Mutagens toxicity
Pigments, Biological isolation & purification
Plant Roots chemistry
Rats
Salmonella typhimurium genetics
Spectrometry, Mass, Fast Atom Bombardment
Spectrophotometry, Ultraviolet
Thiones isolation & purification
Thiones toxicity
Tryptophan analogs & derivatives
Tryptophan isolation & purification
Tryptophan toxicity
Cellulose analogs & derivatives
Pigments, Biological chemistry
Raphanus chemistry
Thiones chemistry
Tryptophan chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 0916-8451
- Volume :
- 66
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Bioscience, biotechnology, and biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 12224627
- Full Text :
- https://doi.org/10.1271/bbb.66.1450