Chloroplast ribosomal RNA genes in the chloroplast DNA of Euglena gracilis |
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Authors: | J R Rawson R Haselkorn |
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Affiliation: | Department of Biophysics, University of Chicago Chicago, Ill., U.S.A. |
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Abstract: | Euglena chloroplast DNA has a buoyant density in CsCI of 1.686. Shearing this DNA produces a satellite band at density 1.700. The satellite, easily lost during preparative CsCI gradient centrifugation of chloroplast DNA, contains the genes for chloroplast ribosomal RNA. Pure Euglena chloroplast DNA is shown to contain one set of ribosomal RNA genes for each 90 × 106 daltons of DNA. |
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