TABLE 1

Embryonic stem cell lines derived from the cross In(15)21Rk +/+ Matpuw × 129X1/SvJ

No. of blastocysts harvested and
   cultured19
No. of ICM outgrowths15
No. of ES cell lines established 7
No. of ES cell lines carrying the
   21Rk inversion (see Figure 1)4 (2 male; 2 female)
No. of inversion ES cell lines tested
   for germline competency (no. of
   germline competent)1 (1)