Crystals of apolipophorin III, isolated from the locust Locusta migratoria, have been reproducibly grown from ammonium sulfate solutions and are well suited for an x-ray crystallographic analysis. Locust apolipophorin III is a glycosylated protein with a molecular weight of 19,100 and interacts with lipophorin, the major lipoprotein complex in insects. The crystals belong to the space group P6122 or P6522 with unit cell dimensions of a = b = 67.5 A, c = 155.6 A and diffract to a nominal resolution of 2.5 A. They are physically robust and are stable in the x-ray beam for over a week. A complete native x-ray data set has been collected and processed to 3.0-A resolution.
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Holden et al. (1988) studied this question.
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