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. 1981 Apr 1;195(1):205–211. doi: 10.1042/bj1950205

Calmodulin-free skeletal-muscle troponin C prepared in the absence of urea.

J A Cox, M Comte, E A Stein
PMCID: PMC1162873  PMID: 6272746

Abstract

A method is described for the rapid preparation of electrophoretically pure troponin C from rabbit skeletal-muscle myofibrils that avoids the use of urea. The three-step procedure includes extraction od the myofibrils with EDTA-containing buffers, one-step elution from DEAE-Sephadex and Sephadex G-100 chromatography in the presence of EDTA. The procedure gives yields comparable with those of currently used methods that involve dissociation of the troponin complex with urea. Except for the thiol-group reactivity, troponin C produced by our method is physicochemically and functionally indistinguishable from that obtained by the classical procedure. Purified troponin C always contains traces of calmodulin. However, this contamination can be decreased to less than 0.02% by means of a second Sephadex G-100 chromatography step in the presence of EDTA.

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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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