| Abstract: | Native DNA from the zooxanthellae harbored by an anemone, Anthopleura elegantissima consists of 2 species resolvable by differences in bouyant density in CsCl. Nuclear DNA has a density of 1.695 g/ml. Chloroplast DNA bands at a density of 1.688 g/ml. A third species of DNA, also with a density of 1.695 g/ml in the native state, is presumably mitochondrial DNA. It was detected in heat-denatured preparations. Nuclear DNA contains, in addition to the 4 usual bases, some 5-methyl cytosine. The latter was absent from chloroplast fractions. |
