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Crystallization and Crystal Data of Monellin

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PMC
Keywords
  • Biological Sciences: Genetics
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  • Biology

Abstract

Crystals of monellin, a sweet protein from Dioscoreophyllum cumminsii, were grown by vapor diffusion of 20% ethanol into buffered protein solution. The crystals are orthorhombic, belonging to space group P21212, with a = 54.4 Å, b = 113.0 Å, c = 40.8 Å, and V = 250,300 Å3. The asymmetric unit contains two complete molecules of monellin. The diffraction pattern of this crystal form extends to at least 2.5 Å, indicating that x-ray structural analysis is possible to near-atomic resolution.

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