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Letter: Plasma concentration of free choline in patients with Huntington's chorea on high doses of choline chloride.

S M Aquilonius·S A Eckernäs
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CholineFemaleHumansHuntington DiseaseJournal Article

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S M Aquilonius, S A Eckernäs. 1975-11-20. Letter: Plasma concentration of free choline in patients with Huntington's chorea on high doses of choline chloride.. https://doi.org/10.1056/nejm197511202932122

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PubMed1979

Lipid metabolism in germinating seeds. Purification of ethanolamine kinase from soya bean.

Ethanolamine kinase has been purified to homogeneity from germinating soya bean (Glycine max L.) seeds. The purified enzyme had a molecular weight of 17--19 000 as estimated by gel filtration and sodium dodecyl suphate-polyacrylamide gel electrophoresis. It would not phosphorylate choline, had a Km for ethanolamine of 8 microM and utilised Mg-ATP. The kinase could be purified in a 37 000 molecular weight form (dimer) which would easily dissociate on storage. In contrast to ethanolamine kinase whose activity was unaffected by the presence of choline in the assay system, soya bean choline kinase, although not phosphorylating ethanolamine, was competitively inhibited by the latter. The purification of specific choline and ethanolamine kinases from germinating soya bean confirmed in vivo observations which had indicated separate enzymes.

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