Antioxidative low molecular weight compounds in marinated herring (Clupea harengus) salt brine

Nina Gringer, Hamed Safafar, Axelle du Mesnildot, Henrik H. Nielsen, Adelina Rogowska-Wrzesinska, Ingrid Undeland, Caroline P. Baron

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This study aimed at unravelling the antioxidative capacity of low molecular weight compounds (LMWC) (peptides, amino acids and phenolic acids) present in salt brines from the marinated herring production. Brines were fractionated into <10 kDa fractions using dialysis and further into 94 fractions using size exclusion chromatography. All samples were analysed for protein, total phenolic content (TPC) and antioxidant activities. Protein-enriched samples were pooled (P1, P2 and P3) and analysed for phenolic acids, total amino acids and peptide/protein sequence using advanced mass spectrometry. All salt brines contain LMWC holding ABTS-radical scavenging activity, reducing power and iron chelating activity. Generally, a strong correlation between TPC and ABTSradical scavenging was found. In contrast, reducing power and iron chelating activity seemed to be caused by peptides. Protein/peptide sequencing revealed 1 kDa peptides with the presence of HDFmotif which could be responsible for some of the antioxidant capacity observed in marinated herring salt brine.
Original languageEnglish
JournalFood Chemistry
Volume194
Pages (from-to)1164-1171
ISSN0308-8146
DOIs
Publication statusPublished - 2016

Keywords

  • Herring brine
  • LMWC
  • Antioxidant
  • Phenolic compounds
  • Peptides

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