The moderate effect of the Z-like element on pause efficiency may have been caused by the fact that this element lacked the equivalent of −20C, which could not be introduced into the sequence since the change destroyed the lacUV5 promoter activity (Supplementary Figure S7).
Likewise, the minority fraction of LAVA_E elements lacking the N-type RU could have been derived from another subfamily.
Expression of most, but not all, intronic elements lacking the U3 region on the other hand appeared to be dependent on expression of their corresponding genes.
However, such transcripts mapped, not only to proviral elements, but also to pseudoelements and truncated elements [ 11- 13], i.e. elements lacking the regulatory motifs in the U3 region of the 5'-LTR.
We recovered seven Yb8 elements lacking the diagnostic CpG mutation at position 64 (loci 8, 116, 216, 262, 327, 371, and 381), consistent with the Yb7.3 subfamily (Carroll et al. 2001).
LINE elements lack the LTRs that are characteristic for the retroviral-like class I TEs.
These elements lack the enzymatic machinery for self-replication and mobilization and their survival depends on hijacking the replicative machinery of active non-LTR retrotransposons.
In two cases, the tumour cells exhibited epithelial elements, lacked the typical architecture of tubules and glomeruloid bodies, and showed atypia and mitotic activity.
The element lacking from the big studios' release schedules this year, says Snyder, is the strong sequel.
