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Methods are described by which ribosomal DNA can be enriched in subcellular fractions of carrot and soybean. With both carrot and cucumber it was possible to obtain a distinct satellite DNA which contained the rDNA. Hybridization values greater than 0.49% were necessary before a satellite component was observed. Saturation hybridization values for soybean, carrot, and cucumber DNA were 0.2, 0.49, and 1.14%, respectively. These values were increased 1.6- and 2-fold in soybean and carrot, respectively, but enrichment was not obtained for cucumber.
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Jaworski et al. (1974) studied this question.
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