stop codon arises after translation of only seven amino acids from the duplicated exon 8. The resulting MCAD monomer is missing the C-terminal domain α-helixes that are responsible for making intersubunit contacts to generate the functional MCAD homotetramer.
Figure 1  Strategy for Disruption of the Mouse Acadm Gene
(A) The MCAD IV2 insertion targeting vector with a deleted 1.3-kb region encompassing exon 10 and flanking sequences. MCAD IV2 undergoes gap repair upon homologous recombination at the endogenous Acadm locus resulting in a duplication of exons 8, 9, and 10 at the disrupted allele.
(B) Southern blot analysis of EcoRI-digested genomic DNA from ES cells screened by PCR. Probe A, a DNA fragment consisting of