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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.
DNA fingerprinting produces a unique banding pattern of DNA fragments for comparison with other DNA samples.
Phylum Placozoa The phylum Placozoa contains a single species of a minute marine animal Trichoplax adharens composed of a dorsal and ventral epithelial layer enclosing loose m
Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectively conductive to a newly discovered divalent cation nam
An interesting observation made by an American biologist H.C. Bumpus (1899) provides a good explanation for normalising selection. Bumpus collected some 136 injured house sparrows
WHAT ARE THE CHARACTERISTICS OF POPULATION IN ANIMAL
Based on your reading of the article "Hello Mothers, Hello Father" which of the following is a correct statement regarding the transplantation of mitochondria? A. The sperm cel
Interact with the Parent and Child to Exchange Information At this time the nurse can learn why the child has come to the hospital and the concerns and expectations he and hi
Q. What is Primary Motor Cortex? Located in precentral gyrus of frontal lobe (anterior to central sulcus, which separates frontal and parietal lobes. Neurons called pyramidal
why are proteins so versatile?
What are the Results of Chronic Pulmonary Thromboembolism? Results : The reported mortality is between 5 and 24 per cent. On follow-up, the six-year survival in the best ce
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