Every one of us has started off as one single tiny cell. The cell had to undergo trillions of cell divisions in order to develop into a fully grown human body. But that’s not everything. Even today, millions of cells divide in your body every day. This is important to replenish blood or other tissues. But not all cells in your body should divide all the time. Therefore, cell division is a tightly regulated process. If the regulation goes wrong, this can lead to cancer or other diseases. We are studying the regulation of the cell division and we do so with frogs. Maybe you ask yourself what frogs have to do with cell division. We are taking the eggs of the frogs and we are specifically interested in the contents of the eggs. Although like this we destroy the eggs, the protein-rich content of the egg still retains the full capacity to undergo the biochemical reactions normally associated with a cell cycle in the test tube. This allows us to identify the specific rules certain proteins have in the process and how they are regulated. In this way we hope that our research contributes to identify new methods in order to treat cancer better in the future.