Three Molecules (IMAGE) Hiroshima University Caption The new molecule linking technique can be imagined as three distinct railway wagons, each possessing two unique couplers at either end, only permitting them to be hitched in a particular order Credit Takeharu Haino Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.