Four-jointed
- Planar cell polarity: two genetic systems use one mechanism to read gradients
Summary: The key molecules responsible for planar cell polarity form bridges that span between neighbouring cells. Gradients across the tissue cause these bridges to be asymmetrically localised within each cell.
- Extramacrochaetae functions in dorsal-ventral patterning of Drosophila imaginal discs
Summary: A Drosophila basic helix-loop-helix protein, Extramacrochaetae, influences dorsal-ventral patterning in the eye imaginal disc and regulates expression of the polarity protein four-jointed.