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While various positive control components lie close to the gene they regulate additional can be situated long distances away (sometimes 10-50 kb) either upstream or downstream of the gene shown in the figure. A long-distance positive control series of this type is called as an enhancer if the transcription factor(s) which binds to it enhances the rate of transcription. An enhancer is classically 100-200 bp long and haves several sequence elements which act together to give the whole enhancer activity. When they were first found, enhancers were viewed as a distinct class of control component in which they:
? Over long distances can activate transcription;
? It can be located downstream or upstream of the gene being controlled;
? Are active in moreover orientation with respect to the gene.
Duck virus hepatitis This highly contagious disease of ducks is caused by a member virus belonging to genus Enterovirus of the family Picornaviridae. It mostly affects duckling
Excretion in Non-Chordates Excretion as described under Introduction of this unit refers to removal of the waste products of metabolism - carbon dioxide (CO 2 ) and water rele
Suppose you are in charge of designing a microcontroller-based system for a packet processing application. These are high speed internet packets from the PC that are going to be pr
What is fixism? Fixism is the theory about the diversity of life on earth that affirms that the current existent species were identical to species of the past and came out alre
#what is coelenterata?
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