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Science 22 September 1972:
Vol. 177. no. 4054, pp. 1104 - 1105
DOI: 10.1126/science.177.4054.1104
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Articles

Microtubule Formation in vitro in Solutions Containing Low Calcium Concentrations

Richard C. Weisenberg 1

1 Department of Biology, Temple University, Philadelphia, Pennsylvania 19122

Isolated rat brain tubulin can be repolymerized in vitro in solutions containing adenosine triphosphate or guanosine triphosphate, magnesium ions, and a good calcium chelator. The extreme sensitivity of tubulin to calcium ions explains the failure of previous efforts to obtain polymerization and suggests a possible mechanism for regulation of microtubule polymerization in vivo.


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