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Multiple fusion aggregate showing two small dark tobacco nuclei (the “eyes”), a superimposed HeLa cell (one “ear”), and two HeLa nuclei with the cell membrane apparently continuous with the protoplast membrane and no visible intervening membranes (about × 4440). See page 401. [William Marin, Jr., Brookhaven National Laboratory, Upton, Long Island, New York]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)