Emulsifying peptides from the tryptic hydrolysis of casein

D. Panyam, A. Kilara

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Casein was hydrolyzed by trypsin to 5% degree of hydrolysis, and the hydrolysate was fractionated by ultrafiltration. While screening for the best emulsifying properties, the retentate fraction was systematically fractionated by ammonium sulfate precipitation, ion exchange, and reverse-phase high-performance liquid chromatography (HPLC). Residue from 30% ammonium sulfate saturation yielded 3 fractions on anion exchange chromatography. Preparative reverse-phase HPLC was used to isolate 4 peptides with good emulsifying properties for characterization. Computational methods were used to complement amino acid sequencing, and the peptides were identified as originating from αs-l casein (f167-208), β-casein (f48-63), and (f129-184). A 4th peptide could not be conclusively identified. Properties of the emulsifying peptides are discussed.

Original languageEnglish (US)
Pages (from-to)FCT154-FCT163
JournalJournal of Food Science
Volume69
Issue number3
DOIs
StatePublished - Apr 2004

All Science Journal Classification (ASJC) codes

  • Food Science

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