Dictyostelium discoideum: A Gamma-Ray Resistant Organism

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Science  13 Dec 1968:
Vol. 162, Issue 3859, pp. 1289-1290
DOI: 10.1126/science.162.3859.1289


The vegetative cells of the slime mold Dictyostelium discoideum are extremely resistant to cobalt-60 gamma rays. The survival curve has a shoulder at low doses and a 10 percent survival dose of 300 kilorads in air. Dose fractionation experiments indicate that repair of sublethal damage is an important factor in this resistance.

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