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. 2005 Feb;17(2):572–583. doi: 10.1105/tpc.104.028522

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Copyright © 2005, American Society of Plant Biologists

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Figure 8. — A Kinase Diffusion Model for Pericentromere Determination.

At top is a prediplotene chromosome and its centromere with unphosphorylated CENH3 (orange). At diplotene, a histone kinase phosphorylates CENH3 first (red), then travels outward over the pericentromere and phosphorylates histone H3 (green) in a diffusion-limited manner. The phosphorylated CENH3 interacts with the spindle, whereas phosphorylated histone H3 marks the pericentromere and serves to enhance or stabilize cohesion deposition.