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Na+ channel distributions during development. a, b, Na+ channel clusters at P15, in three different distributions: focal (a, arrow), binary (a, arrowhead), or broad (b, arrowhead). c, At P19, the majority of Na+ channel clusters were focal, and there was a marked increase in the number of clusters per FOV.d, The fraction of Na+ channel clusters in each category at P12, P15, and P19. Gray bars, Broad; black bars, binary; white bars, focal. Scale bars, 10 μm.
