Cell
Volume 125, Issue 3, 5 May 2006, Pages 432-433
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A Dedicated Wnt Secretion Factor

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The Wnt family of signaling proteins mediates cell-cell communication during development. In this issue of Cell, Bänziger et al. (2006) and Bartscherer et al. (2006) identify Wntless/Evi, a multipass transmembrane protein in the secretory pathway of Wnt-producing cells that promotes Wnt secretion.

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