氷の結晶成長ダイナミクスに対する凍結抑制タンパク質の効果(<小特集>バイオクリスタリゼーション)

抄録

Polar fishes living underneath the sea ice can survive under the supercooled condition of their serum, because a special kind of protein, i.e., antifreeze glycoprotein (AFGP), is included in their serum. AFGP molecules adsorb at the interfaces between ice and water and prohibit the ice crystal growth. In this review, basic effects of AFGP for the ice crystal growth are firstly summarized. Results of ice crystal growth experiments by one-directional growth method are introduced in the second part of this review. Interfacial kinetic supercooling was successfully measured as a function of growth velocity. Furthermore, the self oscillation of growth rate was observed for the crystal growth of ice (1010) plane. A model for these growth modes is proposed on the basis of the non-linearity and the in-reversibility in the relationship between the driving force and growth velocity.