Sentence examples for boundary sequence from inspiring English sources
The boundary shift is unlikely to reflect change in the tectonic setting of the northern Bowen Basin because the detrital character of clastic sediment supply shows no provenance change within the boundary sequence.
The model of vertebrate turnover, from the Daptocephalus to Lystrosaurus Assemblage Zones, tightly constrains the boundary sequence to a short stratigraphic interval where siltstone color begins to change from greenish gray to grayish red, the latter color interpreted to be a consequence of aridification.
We showed that the sequence identified in this series of experiments is a proper boundary sequence, since it had position-effect protection activity as well as insulator activity.
Furthermore, we found that this boundary sequence functions in a tissue-specific manner, and that the regulation of tissue specificity can be separated from the boundary activity.
From our previous observations [14], we predicted that the boundary sequence is located between the Evx2 promoter and the NsiI site, half-way between Evx2 and Hoxd13 (i.e., the relO transgene insertion site) [14] (Figure S1).
We demonstrated that this fragment possesses position-effect protection as well as insulator activity, two activities that are required for a sequence to be considered as a boundary sequence.
This observation demonstrates that delineation of the boundary sequences results in modification of a significant number of the Myc-BestModel sequences.
Constructs containing either a Venus expression marker gene or a Venus marker flanked by candidate boundary sequences (XB fragment) were introduced into NIH3T3 cells by electroporation.
It is also meaningful to identify over-represented novel motifs in each of the fragment of the U-CGIs and the boundary sequences.
Among the over-represented TFBSs within the U-CGIs, some of them are also present in the boundary sequences, e.g. V$SP1_01.
Gaps between two adjacent exon segments in an EST alignment were treated as possible introns and were confirmed by checking intron boundary sequences (GT/AG rule)[59].
