c) Isotope labeling is not just about carbon! Answer the following concerning ?H (deuterium) labeling. If you have forgotten about deuterium .. it is a stable isotope (unlike its heavier sibling.. tritium). Compounds labeled with deuterium are sometimes very useful in metabolomics .. For the following monodeuterated glucose please label any hydrogen atom(s) in the product that would be replaced with more than 50% D-. To indicate the labeled position(s) cross out an "-H" and replace with a "-D") CH,OH H OH - -CO- *D OH OH H. H. OH ... then explain your answer briefly here: