Fachbereich Veterinärmedizin



    Improved purification of beta-lactoglobulin from acid whey by means of ceramic hydroxyapatite chromatography with sodium fluoride as a displacer (2004)

    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Schlatterer, B
    Baeker, R
    Schlatterer, K
    Journal of chromatography. B, Analytical technologies in the biomedical and life sciences; 807(2) — S. 223–228
    ISSN: 1570-0232
    Pubmed: 15203033
    Institut für Veterinär-Biochemie

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    Abstract / Zusammenfassung

    The successful separation of beta-lactoglobulin from other bovine whey proteins was performed by ceramic hydroxyapatite chromatography with a fluoride ion gradient in phosphate buffer as displacement agent. The method was applied to acid whey originating from milk of healthy as well as of mastitic cows. beta-Lactoglobulin was completely eluted in one peak at a fluoride concentration of about 0.6 mol/l. The purity of beta-lactoglobulin in this fraction was at least 96% if whey from healthy milk was processed. Co-eluted contaminants are traces of immunoglobulin G, serum albumin and lactoferrin. In case of mastitic whey the proportion of beta-lactoglobulin is diminished as the amounts of immunglobulin G, serum albumin and lactoferrin are increased within this fraction. Size exclusion chromatography on Superdex 75 pg effectively removed contaminants resulting in a purity for beta-lactoglobulin from normal whey of approximately 99%. The yield of beta-lactoglobulin from physiological whey was 50-55% referring to the fraction highly enriched with beta-lactoglobulin by hydroxyapatite chromatography. In case of mastitic milk the higher amounts of contaminants were also removed successfully by size exclusion chromatography.