A strategy designed to decipher the function of proteins identified in RNA interference screens reveals new insights into mitosis.Authors: James R. A. Hutchins, Yusuke Toyoda, Björn Hegemann, Ina Poser, Jean-Karim Hériché, Martina M. Sykora, Martina Augsburg, Otto Hudecz, Bettina A. Buschhorn, Jutta Bulkescher, Christian Conrad, David Comartin, Alexander Schleiffer, Mihail Sarov, Andrei Pozniak