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. 1976 Mar;17(3):679–685. doi: 10.1128/jvi.17.3.679-685.1976

In vitro replication of cowpea mosaic virus RNA. II. Solubilization of membrane-bound replicase and the partial purification of the solubilized enzyme.

P Zabel, I Jongen-Neven, A Van Krammen
PMCID: PMC515465  PMID: 1255853

Abstract

A method for the solubilization of membrane-bound Cowpea mosaic virus RNA replicase has been developed by bypassing the use of detergents. Solubilization has been achieved by washing the 31,000 x g-pellet containing the bound replicase with a Mg2+-deficient buffer. This procedure had several advantages as compared to treatments with nonionic or ionic detergents: (i) the solubilized enzyme was stable at 4 C, (ii) more than 80% of the replicase could be solubilized without loss of total enzyme activity, (iii) the replicase was rather selectively released resulting in a two- to threefold increase in specific activity per se, and (iv) most of the green color from chloroplast fragments present in the crude replicase fraction remained membrane bound resulting in only slightly colored preparations of solubilized enzyme. The solubilized replicase has been further purified by DEAE-Bio Gel column chromatography. RNA synthesis directed by the DEAE-purified enzyme was template dependent and proceeded at a linear rate for at least 9 h.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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