Gene Expression in Eukaryotes

Not only the end result of different functional DNA sequences, but also internal expression systems not only by different protein and RNA sequences at a given time existing within the cell. DNA encodes a number of possible functions, but different types of external signals of RNA expression of a particular protein can be used to support the desired gene. Control of gene expression is essential for the survival of eukaryotes such as openings, based on changes in the ability to turn off the environment / gene (Campbell and Lease, 2008).

Control of eukaryotic gene expression is more complicated than in prokaryotes. Typically, the number of larger regulatory proteins may be located away from the site of relatively distant transcription promoters away to regulate binding sites. In addition, it is tuned to allow greater flexibility in controlling gene expression by the action of several proteins that generally regulate the composition together in eukaryotic gene expression. As mentioned above, the DNA sequences that enhance binding sequences are activated by proteins and they can place thousands of base pairs of promoters from upstream or downstream genes. Binding Activated Protein DNA is thought to cause circulation to RNA polymerase and other proteins and activated protein complexes to promote physical proximity of transcription initiation (Figure 4)

Regulate gene expression is maintained. The distinction of such adjustment, especially between prokaryotes and eukaryotes, especially in complex. Regulation of gene expression in prokaryotes occurs at the stage of transcription and includes one stage. On the other hand, regulation of eukaryotic gene expression occurs not only at the transcriptional level, but also after the transcription, not only at the translational and post translational levels (Latchman 2007)

Eukaryotic genes, no operons are independently adjustable. This relates to a series of events related to multiple levels of modulation and is referred to by the presence of molecules or transcription factors that do not affect the presence of gene expression in the general higher organism. These factors can affect the basic control level of the gene, ie, the rate of transcription, and can act as an activator or enhancer. Certain transcription factors regulate the production of RNA from genes at a particular time, a particular type of cell. Transcription factors are often found and linked in the regulatory regions of promoters or genes in higher organisms. Removal of intron (noncoding nucleotide sequence) from primary transcript by transcription, post-transcription, a process called editing, splicing. The result of these processes is a functional mRNA chain. After translating some genes under control and being translated,