Table 1 Developmental efficiencies of SCNT embryos and ntESC derivation.

Strain (Species name)	Donor cell	Sex	No. embryos cultured	No. embryos at 24 h (%/No. cultured)		No. blastocysts (%/No. 2-cell)	No. established ntESC lines (%/No. blastocysts)
Strain (Species name)	Donor cell	Sex	No. embryos cultured	Fragmentation	2-cell	No. blastocysts (%/No. 2-cell)	No. established ntESC lines (%/No. blastocysts)
B6D2F1 (M. m. domesticus)	Cumulus	F	150	18 (12)^a,b	127 (85)^a	41 (32)^a	6/17 (35)^b
	Leukocyte	M	96	30 (31)^a′	50 (52)^a′	13 (26)	8 (62)
	Leukocyte	F	140	64 (46)^a′,c	58 (41)^a′,c,d	23 (40)^c,d	14 (61)
CAST/Ei (M. m. castaneus)	Leukocyte	M	166	59 (36)^b′	83 (50)^a′	14 (17)^a′	8 (57)
CAST/Ei (M. m. castaneus)	Leukocyte	F	88	33 (38)^b′	51 (58)^d′	4 (8)^a′,c′	3 (75)
CASP/1Nga (M. m. castaneus)	Leukocyte	M	68	18 (26)	42 (62)	13 (31)	5 (38)
CASP/1Nga (M. m. castaneus)	Leukocyte	F	88	24 (27)^c′	56 (64)^c′	10 (18)^b′,d′	8 (80)^b′

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