The maternal nudel protein of Drosophila has two distinct roles important for embryogenesis.

Abstract excerpt

The nudel gene is maternally required to define dorsoventral polarity of the Drosophila embryo. It encodes an unusual mosaic protein with a protease domain that may trigger the protease cascade required for ventral development. We describe phenotypic and molecular analyses of nudel mutations that provide further insight into nudel protein function. Surprisingly, nudel mutations primarily cause either dorsalized...

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