Zebrafish eigengenes (IMAGE)
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Neuroscientists tracked gene expression patterns across thousands of genes in two bordering regions of the zebrafish brain, colored red and blue. “Unlike an army, which has explicit chains of command with a general at the top, development lacks a central organizer,” they write. “There is no general. Early in development, cells form a tightly coupled unit through local signals. As tissue grows and cells drift out of range, these local units fracture into subunits that inherit the states of their progenitors.”
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Zador lab/CSHL
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