Table 1. MEF aneuploidy rates prior to reprogramming.

MEFgenotype	Line	Mitoticcellsinspected	Percentaneuploidcells	Karyotypes with the indicated chromosome number
				35	36	37	38	39	40	41	42	43	44
Wildtype	1	50	12	1	1		1	1	44	2
	2	50	10				1	2	45	2
	3	50	8					1	46	2		1
BubR1 H/H	1	50	38	1		3	1	5	31	1	4	3	1
	2	50	40	3		2	3	3	30	3	4	1	1
	3	50	36		4	3	1	2	32	4	2	2
RanBP2 –/H	1	50	30		2		2	1	35	6	1	3
	2	50	34			2	2	7	33	5	1
	3	50	34		2	1	2	5	33	2	3	2

Chromosome counts were performed at P5.