Water-soluble peptides in Cheddar cheese: isolation and identification of peptides in the diafiltration retentate of the water-soluble fraction
Autor: | Tanoj K. Singh, Patrick F. Fox, Aine Healy |
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Rok vydání: | 1995 |
Předmět: |
Molecular Sequence Data
Chemical Fractionation Mass spectrometry High-performance liquid chromatography Chromatography DEAE-Cellulose Mass Spectrometry Cheese Amino Acid Sequence Peptide sequence Chromatography High Pressure Liquid Electroblotting chemistry.chemical_classification Chromatography Water General Medicine Amino acid Diafiltration Membrane Solubility Biochemistry chemistry Electrophoresis Polyacrylamide Gel Animal Science and Zoology Cell envelope Peptides Sequence Analysis Filtration Food Science |
Zdroj: | Journal of Dairy Research. 62:629-640 |
ISSN: | 1469-7629 0022-0299 |
DOI: | 10.1017/s0022029900031368 |
Popis: | SUMMARYThe water-soluble extract of Cheddar cheese was fractionated by diafiltration using 10 kDa cut-off membranes. Peptides were isolated from the diafiltrate retentate by chromatography on DEAE-cellulose with a linear NaCl gradient in 50 mM-Tris-HCl, pH 8·6, and reversed-phase HPLC or electroblotting from urea-PAGE gels. Peptides were identified by determining N-terminal amino acid sequences and mass spectrometry. Most (45) of the total 51 peptides identified in the diafiltrate retentate originated from β-casein, especially from a short region in the N-terminal half of the molecule. Only six peptides originated from αs1-casein; β-lactoglobulin was also identified in the retentate. The origin of most of these peptides could be explained on the basis of known specificities of lactococcal cell envelope proteinases. |
Databáze: | OpenAIRE |
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