Regulated activation of the PAR polarity network ensures a timely and specific response to spatial cues. J.D. Reich, L. Hubatsch, R. Illukkumbura, F. Peglion, N. Hirani, N.W. Goehring. Current Biology 29(12):1911-1923.e5 (2019). Open Access Link
See Cell Polarity: Getting the PARty Started.