| N(delta)-(5-hydroxy-4,6-dimethylpyrimidine-2-yl)-l-ornithine, a novel methylglyoxal-arginine modification in beer. | |
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MedLine Citation:
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PMID: 11170600 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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N(delta)-(5-Hydroxy-4,6-dimethylpyrimidine-2-yl)-L-ornithine, or Argpyrimidine, was identified and quantified in beer by high-performance liquid chromatography (HPLC) and coupled gas chromatography-mass spectrometry (HRGC-MS). This novel fluorescent arginine Maillard modification represents the first amino acid modification reported in beer retaining the full backbone of the original amino acid. Two mechanisms of formation could be verified: the major pathway via methylglyoxal and the minor pathway via 5-deoxypentoses. Argpyrimidine concentrations, determined in 35 lager-type beer varieties, reached up to 27 nmol/L and could be positively correlated to beer color and wort content. Within this context, 5-deoxy-D-ribose was identified as a novel intermediate of the Maillard reaction of maltose by HRGC-MS and independent synthesis. |
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Authors:
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M A Glomb; D Rösch; R H Nagaraj |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 49 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2001 Jan |
Date Detail:
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Created Date: 2001-02-22 Completed Date: 2001-06-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 366-72 Citation Subset: IM |
Affiliation:
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Institute of Food Chemistry, Technical University of Berlin, Gustav-Meyer-Allee 25, TIB4/3-1, 13355 Berlin, Germany. glom1530@mailszrz.zrz.tu-berlin.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetone
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analogs & derivatives*,
chemistry Aldehydes / chemistry Beer / analysis* Chromatography, High Pressure Liquid Color Deoxyribose / analysis Gas Chromatography-Mass Spectrometry Maillard Reaction Ornithine / analogs & derivatives, analysis*, chemical synthesis Pyrimidines / analysis*, chemical synthesis Pyruvaldehyde / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Aldehydes; 0/Pyrimidines; 0/argpyrimidine; 116-09-6/acetol; 533-67-5/Deoxyribose; 67-64-1/Acetone; 7006-33-9/Ornithine; 78-98-8/Pyruvaldehyde |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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