Cells are masters of self-protection. Their membranes let in substances that are vital for them, but block out other substances – including those that could be used to fight diseases. Overcoming this natural barrier is a central concern of cell research. Scientists at Jacobs University Bremen and the Spanish University of Santiago de Compostela have now succeeded in doing so. They have developed a new method for transporting drugs and peptides into the cell. The results of their research have now been published in the renowned journal Nature.