Abstract
Partially purified DNA-dependent RNA polymerase ofStreptomyces granaticolor was further separated on phosphocellulose in 50% glycerol and a single activity peak was obtained. The enzyme isolated in this way consisted of 4 main proteins with molar mass of 145, 132, 50 and 46 kg/mol. These four subunits, represented 93% proteins of the active fraction. To test the ability of RNA polymerase to recognize specific sites on DNA, binding sites for RNA polymerase on phage ϕ29 DNA were mapped by electron microscopy. The specific binding sites detected were compared with those for RNA polymerases fromEscherichia coli andBacillus subtilis.
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Ŝmardová, J., Felsberg, J., Ŝmarda, J. et al. Isolation of DNA-dependent RNA polymerase fromStreptomyces granaticolor and its binding to phage ϕ29 DNA. Folia Microbiol 36, 120–126 (1991). https://doi.org/10.1007/BF02814489
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DOI: https://doi.org/10.1007/BF02814489