Thanks Olga for introducing us a vivid approach to understand the complex biological system! Actually, I always thought, the cell is just like the society and the proteins within are like the people. So just like people in the society must conform to the rules of the society, protens within the cells should also conform to the rules the cell made. One protein has both the friends and the enemies. And once stimulated by certain cytokines, some proteins must make team with certain proteins to perform some things to response. However, after the stimulus, the proteins remain live theirs normal lives, every protein does its own business. All in all, the proteins in cell live an order life, if the order is disrupted, that is the cancer comes!