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  • Title: Crystallization of an endochitinase from Hordeum vulgar L. seeds.
    Author: Hart PJ, Ready MP, Robertus JD.
    Journal: J Mol Biol; 1992 May 20; 225(2):565-7. PubMed ID: 1593638.
    Abstract:
    Higher plants contain several constitutively expressed proteins for protection against infections by viruses, bacteria and fungi. Here we report the crystallization of a polypeptide with antifungal activity, a 26,000 dalton endochitinase from barley (Hordeum vulgare L.) seeds, in a form suitable for high-resolution X-ray analysis. Crystals were grown by vapor diffusion under several different conditions. The best crystals, obtained with ammonium sulfate as the precipitant, belong to the tetragonal space group P4(1)2(1)2 (P4(3)2(1)2), with cell dimensions a = b = 62.9 A and c = 96.0 A. The cell dimensions are consistent with one endochitinase molecule per asymmetric unit, and the crystals diffract to at least 2.0 A resolution.
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