Genomic PCR verification of ETn/MusD intronic insertions in different mouse strains^a.

aFull names of mouse strains are given in Materials and Methods. A (p) after strain names indicates computational predictions. bCorresponding position in B6 genome (version mm8). cA: insertion is antisense to gene; S: insertion is sense to the gene. d+ indicates presence of insertion; - indicates absence of insertion; “F” indicates PCR failure. eY: computational prediction of having insertion; N: computational prediction of no insertion; ?: presence of insertion could not be determined computationally. fSize of ERV insertion (approximate for cases 1–28).