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The tobacco mitogen-activated protein kinase kinase kinase NPK1 regulates lateral expansion of the cell plate at cytokinesis. Here, we show that the kinesin-like proteins NACK1 and NACK2 act as activators of NPK1. Biochemical analysis suggests that direct binding of NACK1 to NPK1 stimulates kinase activity. NACK1 is accumulated specifically in M phase and(More)
TBK5 is a plant-specific kinesin constantly expressed in tobacco BY-2 cells. An analysis of the distribution of green fluorescent protein-tagged TBK5 (GFP-TBK5) transiently expressed in BY-2 protoplasts revealed that TBK5 could associate with microtubules in vivo. GFP-TBK5 often assembled to form a single particle when accumulated in cells. The particle was(More)
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