Scientists from the Institute of Research in Biomedicine (IRB Barcelona) have identified a new function of the Notch protein, opposite to the one already known. Such protein is located in the membranes of cells and triggers a cascade of signals that regulate the expression of genes that makes the cell divide, grow, migrate, specialize, or die. Now, researchers have discovered that the protein is also required to inactivate the signalling pathway. The work was published in the journal 'Current Biology'.