About the Cover
Cover legend: Mature cultured cortical pyramidal neurons expressing GFP (green) and a guanine-nucleotide exchange factor, kalirin-7 (magenta; note magenta + green = white). Kalirin-7 is concentrated in dendritic spines, where it plays an important role in synaptic structural plasticity. For more information, see the article by Xie et al. in this issue (pages 6079–6091).
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