Nuclear Mitochondria?

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Science  17 Sep 1965:
Vol. 149, Issue 3690, pp. 1373-1374
DOI: 10.1126/science.149.3690.1373


Recognizable mitochondria were detected in the nucleus of a leukemic cell. It is suggested that passage through enlarged nuclear pores, incorporation within a pinched off invagination, or inclusion within the nuclear envelope at telophase may have been responsible for this unusual event.