Mineralization of CaCO 3 in the presence of egg white lysozyme

Alina E. Voinescu, Didier Touraud, Alois Lecker, Arno Pfitzner, Werner Kunz*, Barry W. Ninham

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    50 Citations (Scopus)

    Abstract

    The influence of egg white lysozyme on the size, shape, crystallography, and chemical composition of amorphous calcium carbonate (ACC) particles obtained from aqueous CaCl 2-dimethyl carbonate (DMC)-NaOH solutions was studied. At the onset of precipitation, the presence of lysozyme led to much smaller particles (50-400 nm spherical amorphous lysozyme-calcium carbonate particles (Ly-ACC)) than those obtained from lysozyme-free solution. The nanospheres were in some cases aggregated and in addition embedded in a faint network. Their size and interconnection depended on the concentration of egg white lysozyme. When the Ly-ACC particles were left in contact with the mother liquor (CaCl 2/DMC/NaOH/ly sozyme solution) for 24 h, they transformed directly and exclusively into crystalline calcite. The observed results may be of relevance for a better understanding of the role of lysozyme in the process of eggshell mineralization.

    Original languageEnglish
    Pages (from-to)12269-12274
    Number of pages6
    JournalLangmuir
    Volume23
    Issue number24
    DOIs
    Publication statusPublished - 20 Nov 2007

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