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Lipophorin from the grasshopper, Gastrimargus africanus

Insect Biochemistry, ISSN: 0020-1790, Vol: 16, Issue: 5, Page: 797-802
1986
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Article Description

The major hemolymph lipoprotein, lipophorin, was isolated from the grasshopper, Gastrimargus africanus. In the resting form the lipoprotein is composed of two apoproteins, apolipophorin I ( Mr 250,000) and apolipophorin II ( Mr 80,000). Following the administration of synthetic locust adipokinetic hormone to adult G. africanus the density of lipophorin decreased from 1.10 to 1.05 g/ml, and a third apoprotein, apolipophorin III (apoLp-III), associated with the particle. ApoLp-III was isolated from the low density form of lipophorin, using organic solvents to extract the lipids and to denature apolipophorin I and II. The purified apoLp-III has an Mr = 20,000 and contains 5.3% carbohydrate. The protein and its physiological functions appear similar to apoLp-III of Manduca sexta, although the lepidopteran apolipoprotein has a lower molecular weight and does not contain carbohydrate.

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