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BreviaGlycine-Rich Antifreeze Proteins from Snow FleasWe purified antifreeze proteins from winter-active snow fleas, Hypogastrura harveyi. These 6.5- and 15.7-kilodalton thermolabile proteins are glycine-rich (45% of the residues), and the short isoform is composed of the tripeptide repeat Gly-X-X. This makes them very different from other antifreeze proteins, including two from insects, suggesting independent adaptation to freezing environments.
1 Department of Biochemistry. * To whom correspondence should be addressed. E-mail: daviesp{at}post.queensu.ca
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Science. ISSN 0036-8075 (print), 1095-9203 (online)