title: Tilting at nodal windmills: planar cell polarity positions cilia to tell left from right.
abstract: Nodal flow orients the left-right axis in some vertebrates, and is generated by clockwise-rotating cilia that are tilted posteriorly. In a recent paper, Song et al. add to mounting evidence that the planar cell polarity (PCP) pathway coordinates posterior positioning of cilia and subsequent determination of left-right asymmetry.
authors.affiliation: Department of Biochemistry and Biophysics, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94158-2324, USA.
authors.forename: Nicole
authors.initials: N
authors.lastname: Santos
authors.forename: Jeremy F
authors.initials: JF
authors.lastname: Reiter