The recent identification and characterization of the Caenorhabditis elegans gene spn-4 has shed new light on the mechanisms that link embryonic polarity to the specification of cell fates.
Labbé, J. C., & Goldstein, B. (2002, June 4). Embryonic development: A new SPN on cell fate specification. Current Biology. Cell Press. https://doi.org/10.1016/S0960-9822(02)00884-9