As compared to MCF7 cells, the embryonal carcinoma cells 2102Ep accumulate comparable global levels of L1HS-Ta transcripts, but seem to have a higher number of permissive L1HS-Ta loci, each contributing to a smaller proportion of the total, although the number of active instances still represents a small fraction (<10%) of all L1HS-Ta copies in these cells. Here, TOR1A is linked to embryonal carcinoma.