Nuclear Pore Complexes, Sem #2
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Nuclear Pore Complexes, Sem #2
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Nuclear pore complexes. Coloured scanning electron micrograph (SEM) of the surface of a cell nucleus showing the numerous nuclear pore complexes (NPCs, rings) in its envelope. All material moving between the nucleus and the cytoplasm passes through these channels. They allow passive transport (diffusion) of ions and small molecules and active transport (energy dependent) of proteins and RNAs (ribonucleic acids).
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May 14th, 2013
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