When an upstream promoter region (−2139 to −1172) was deleted, the promoter activity was found to elevate about 4-fold, indicating that a negative regulation element may exist in the region (Figure 2A).
Our findings are somewhat unique in that the two genes show no sequence similarity, yet maintain a strong conservation in expression regulation elements.
The complexity of sex determining regions varied among a wide range of species between the simplest in yeast where only a gene and its expression regulation elements exist [ 85] and the most complex, the sex chromosomes in papaya [ 86- 88].
Deletion mutants, designed for a detailed evaluation of the methanol regulation elements (AOX2-UAS, AOX2-URS1, and AOX2-URS2) did not respond to the addition of oleic acid.
Molecular function terms showed a significant percentage (39%) to "nucleotide/nucleic acid binding", which showed an enrichment of transcription factors and gene regulation elements.
Both GRDBD and ERDBD belong to the zinc-finger family of DNA binding proteins and bind to GR regulation elements (GRE 32 and ER regulation elements (ERE 33, respectively.
Furthermore, some putative regulation elements of both miR-181 and miR-1 were located.
These deletions appear to disrupt regulation elements other than self-assembly that exist in MHC-IIB and are required for normal cytoskeletal association.
In contrast, GM-CSF Ori1 and GM-CSF Ori2 are located ∼7 Kb downstream of the GM-CSF gene, in a region that shows no apparent transcription or canonical marks of the presence of cis-acting transcriptional regulation elements.
