The phrase "a core sequence in" is correct and usable in written English.
It can be used to refer to an essential or fundamental series of events, elements, or components within a particular context or subject.
Example: "The curriculum includes a core sequence in mathematics that all students must complete."
Alternatives: "a fundamental series in" or "an essential sequence in".
It is also possible to see remnants of a core sequence at that position in chicken (Fig. 4).
E. coli has ∼3000 promoters, each of which contains a core sequence ∼35 base pairs in length comprised of hexameric consensus sites at the −35 (TTGACA) and −10 (TATAAT) regions relative to the transcription start site, although the spacing and sequence composition of these sites can vary significantly.
It is interesting to note that the first 3 bases in the TIRs from the T. castaneum and A. aegypti elements are identical to those in the TIR of S. mansoni, suggesting that animal TRCs may display a CCC core sequence in their TIRs analogous to the CACTA core sequence in TIRs from CACTA transposons.
Beginning with the most recent study, van den Bogaard and Schmincke were, in 2002, able to successfully identify 13 discrete tephra layers in a core sequence c. 7.5m long.
Based on a core sequence of 382 bp present in 2713 mitochondrial D-loop sequences from pigs belonging to 38 local breeds from nine countries, five cosmopolitan breeds and wild boars from 14 countries, we identified 164 haplotypes.
This motif is immediately adjacent to and downstream of the α1 domain and consists of a core sequence Y-[LMIF]-x Y-[LMIF]-x Y-[LMIF]-x a larger conserved motif.
Centromeres of C. albicans, though not embedded in long tracts of repetitive DNA, show a similar structural organisation, in which a core sequence is located near short inverted/direct repeats.
The family is characterized by an evolutionarily conserved DNA-binding domain that regulates expression by binding to a purine-rich core sequence in cooperation with other TFs.
(ii) Arrange all core sequences in the descending order for these scores.
Most of the degeneration can be explained by mutations of a single nucleotide within the GATA core sequence in the process of evolution.
