Selenium distribution in egg white proteins
- 1 March 1993
- journal article
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 196 (3) , 236-238
- https://doi.org/10.1007/bf01202739
Abstract
Die vorliegenden Studien wurden vorgenommen, um die Selen-Verteilung in Eiweiß zu charakterisieren. Ionenaustauschchromatographie und Atomabsorptionspektrometrie wurden gebraucht, um Eiweißproteine zu trennen und den Selengehalt verschiedener Fraktionen zu bestimmen. Nach Isolation wurden neun verschiedene Proteine mit SDS-PAGE identifiziert und 56% des totalen Seleninhalts ist an Ovalbumin-1 und −2 (zirka 500 ng/g) gebunden, was dem höchsten Proteinwert in Eiweiß entspricht. Flavoprotein war das an Selen reichhaltigste Protein (1800 ng/g). Der Seleninhalt der anderen Proteine Lysozym, Conalbumin, Glo bulin und Ovomucoid lag zwischen 359 und 1094 ng/g. The present studies were undertaken to characterize selenium distribution in egg white. Ion-exchange chromatography fast protein liquid chromatography (FPLC) and flow injection atomic (absorption) spectrometry (FIAS) were used to separate egg white proteins and to determine the selenium content of different fractions. After purification, nine different proteins were identified with sodium dodecyl sulphate-polyacrylamide gel electrophoresis and 56% of the total selenium content was found to be associated with ovalbumin −1 and −2 (±500 ng/g), which is the main protein in egg white. Flavoprotein was determined to be the richest seleniumcontaining protein (1800 ng/g). The selenium content of the other proteins (lysozyme, conalbumin, globulins and ovomucoid) ranged from 359 to 1094 ng/g.Keywords
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