Acetabularia Chloroplast DNA: Electron Microscopic Visualization

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Science  22 May 1970:
Vol. 168, Issue 3934, pp. 981-982
DOI: 10.1126/science.168.3934.981


Isolated chloroplasts of Acetabularia mediterranea, lysed by osmotic shock in a protein monolayer, released large amounts of supercoiled DNA. In some cases, the DNA radiated in large loops from centers of organization. The amount of DNA per chloroplast may be similar to that of a bacterium.

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