Table 2. Karyotype of targeted rat ES cell clones.

Cell Line	Oxygen (%)	Passage	Karyotype (%)#	Plates counted
RIF5.2	2	6	60	50
RIF5.2, 1-B9	2	22	63	38
RIF5.2, 3-B4	2	21	0	36
RISD10	21	10	69	52
RISD10, 6.7, tg13	21	13	68	22
RISD10, 6.7, tg14	21	12	0	20
RISD10, 6.7, tg16	21	13	69	16
RISD10, 2.2, tg14	21	12	64	42

^#Percentage of metaphase plates containing euploid chromosome number of 42.