Biophysical Journal 64: 1878-1884 (1993)
© 1993 the Biophysical Society

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Antifreeze glycopeptide adsorption on single crystal ice surfaces using ellipsometry

P. W. Wilson ^*, D. Beaglehole ^* and A. L. DeVries 

Physics Department, Victoria University of Wellington, Wellington, New Zealand
Department of Physiology and Biophysics, University of Illinois, Urbana-Champaign, USA

ABSTRACT

Antarctic fishes synthesise antifreeze proteins which can effectively inhibit the growth of ice crystals. The mechanism relies on adsorption of these proteins to the ice surface. Ellipsometry has been used to quantify glycopeptide antifreeze adsorption to the basal and prism faces of single ice crystals. The rate of accumulation was determined as a function of time and at concentrations between 0.0005 and 1.2 mg/ml. Estimates of packing density at saturation coverage have been made for the basal and prism faces.

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