Displaying 6 results of Biopterin Stable Isotopes Biopterin stable isotopes refer to isotopes of the molecule biopterin that have a stable nucleus which does not undergo radioactive decay. These isotopes are used in biochemical research to study the metabolism and function of biopterin in various biological systems. By labeling biopterin with stable isotopes, researchers can track its movement and interactions within the body, providing insights into the role of this important molecule in health and disease.