Homozygosity for the BAC transgene can rescue both the <i>Icst</i> and knockout lethal phenotypes.

For each cross the progeny from two matings was counted. aall are homozygous for the transgenic BAC. bincludes 1 taken for analysis before weaning. cincludes 3 taken for analysis before weaning. There were 2 found dead on P0. dincludes 5 taken for analysis before weaning. There were 4 that did not survive to weaning. eincludes 2 taken for analysis before weaning. There was 1 found dead on P1. fincludes 4 taken for analysis before weaning. There were 3 that that did not survive to weaning. gTest for significance using Chi-square test.