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The nucleus has an inner and an outer membrane and is perforated through 3000-4000 nuclear pores. Each pore having of a nuclear pore complex of more than 100 several proteins organized in a hexagonal array. Whereas little molecules can pass by the pore by free diffusion and large proteins entering the nucleus need a nuclear localization signal. That is four to eight amino acids long and is rich in the positively charged amino acids arginine and lysine as well as commonly having proline, and is situated internally within the polypeptide chain. The protein is taken by the pore in an ATP- requires step and enters the nucleus without cleavage of the localization signal.
Figure: Uptake of proteins into the mitochondrial matrix
The Red Data Book Species judged as threatened are listed by various agencies as well as by some private organisations. The most cited of these lists is the Red Data Book. It
economic importance of viruses and bacteria ?
Ask questionLIMITATION OF ECOLOGICAL PYRAMIDS #Minimum 100 words accepted#
Lamellar compaction and remodeling (6 to 18 weeks) A remodeling phase is initiated in which hematopoietic-derived osteoclastic cells form cutting cones will remove the establis
Is the nervous system in platyhelminthes more or less sophisticated than in cnidarians? What are the main neural structures found in flatworms? How is this neural organization impo
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Lactate dehydrogenase (LDH) is one of the important enzymes in glycolysis which catalyzes the interconversion of pyruvate and lactate as follows: Functional lactate d
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