During development, polarity proteins play an important role by positioning cells and their machinery in the proper orientation. A recent paper asked how a well-studied set of polarity proteins functions in the oocyte of the fruit fly Drosophila. Image above shows an egg chamber, with microtubules in red and DNA in blue.
Reference: Pierre Fichelson, Marlène Jagut, Sophie Lepanse, Jean-Antoine Lepesant and Jean-René Huynh, 2010. Development: 137, 815-824. doi: 10.1242/dev.045013. Adapted with permission by Development. Paper can be found here.