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Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region near the gene or at sites located a long distance away from the gene, called as silencers. The repressor protein should inhibit transcription directly. One instance is the mammalian thyroid hormone receptor that, in the absence of thyroid hormone represses transcription of the goal genes. Furthermore, other repressors inhibit transcription by blocking activation. This can be get in one of several ways: by blocking the DNA binding site for an activator protein, through binding to and masking the activation domain of the activator factor, or by forming a non-DNA binding complex with the activator protein. Several instance of every mode of action are known.
signals for parturition is originate from
Q. Dietary Management of diverticular disease? Most of the diseases which we have discussed so far do not require any major changes in the nutrient intake. The patients general
a sea urchin egg is injected with an mRNA encoding the cadherin protein fragment described above and an mRNA encoding the Pmar1 transcription factor. The embryo is allowed to devel
Explain periodontal ligament The absence of the periodontal ligament and the presence of osseointegration instead of the gomphosis joint leads to the difference in movement un
What is genetic engineering? The Genetic engineering is the use of genetic knowledge to artificially manipulate genes: It is one of the fields of biotechnology.
Polyphyletic Theory - Metazoa This theory was suggested by Greenheig (1959) and some other workers. According to this theory, sponges, coelenterates, ctenophores and flatworms
In cats, curled ears (Cu) results from an allele that is dominant over an allele for normal ears (cu). Black colour results from an independently assorting allele (G) that is domin
Aves has a nucleated rbc or not???
Circulatory Systems in Animals In animals that have efficient circulatory systems and readily permeable vascular skins, gas exchange occurs through the integument. Thus we fin
what are some physical features of the ocean
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