Title
Selenium content of sheep's milk and its distribution in protein frictions Selenium content of sheep's milk and its distribution in protein frictions
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Berlin ,
Subject
Pharmacology. Therapy
Source (journal)
Zeitschrift für Lebensmittel-Untersuchung und -Forschung. - Berlin, 1943 - 1996
Volume/pages
196(1993) :6 , p. 536-539
ISSN
0044-3026
ISI
A1993LG58700006
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
The selenium (Se) distribution in sheep's milk is reported. Skim milk was found to contain the major part (98%) of total milk Se. The Se distribution over casein and whey protein fractions depends on the separation method used, but irrespective of these methods, skim milk Se is mainly associated with the casein fraction (>68%). Approximately 11%, 4% and 17% Se is removed by dialysis (molecular mass cut-off 10-12 kDa) from skim milk, casein and whey respectively, indicating a major association of Se with milk proteins. This observation is confirmed through Se analysis of individual caseins and whey proteins isolated through ion-exchange chromatography and gel filtration. Se concentrations of the different isolated milk proteins show considerable variations (caseins, 304-750 ng Se/g; whey proteins, 241-806 ng Se/g).
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