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iPSC formation in various mouse strains. The graph indicates the number of ES-like colonies at day 26 after infection. 4F, Oct3/4, Sox2, Klf4, and c-Myc; 3F, Oct3/4, Sox2, and Klf4. B6 denotes the C57BL/6 mouse strain. Error bars indicate the standard deviations (n = 2).
