[The character of the distribution of chloroplast DNA from higher plants in a cesium chloride density gradient].

The nature of distribution of the chloroplast DNA from three species of higher plants (Sp. oleracea, N. tabacum, P. sativum) in the CsCl density gradient has been investigated DNA preparations isolated from the fractions of chloroplasts completely deprived of the admixtures of nuclei and mitochondria are characterized by symmetric distribution in the density gradient. Fragmentation of chloroplast DNA of higher plants is not accompanied by the appearance of the discrete satellite components. It has been shown that the satellite DNA component found in the fraction of the unpurified chloroplasts are entirely mitochondrial DNA.