Ran as a small g protein-protein in the family category, with GTP hydrolysis activity, exercised in the cell "molecular switch" function. Using the yeast two-hybrid study results show that Ran in cell-periods between the nucleus and cytoplasm of transport, spindle Assembly and the nuclear membrane of the reconstruction process. In addition, studies have shown that Ran also affects growth hormone signaling pathways, may be involved in synthesis of phytohormones, transport, process of synthesis and breakdown.
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