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About the Cover
Confocal micrograph of C. elegans one- and two-cell embryos labeled with anti-LET-99 antibodies (green and yellow) and DAPI (blue). The regions where pixel values are higher than twice that of the background values are colored in yellow. LET-99 is expressed at high levels in a band encircling asymmetrically dividing cells, in response to PAR polarity cues. For further details, see article by M.-F. B. Tsou, A. Hayashi, L. R. DeBella, G. McGrath and L. S. Rose, in this issue Development 129, 4469-4481.
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