Insulin-like growth factor-II/mannose 6-phosphate receptor is incapable of activating GTP-binding proteins in response to mannose 6-phosphate, but capable in response to insulin-like growth factor-II. - Okamoto,T.; Nishimoto,I.; Murayama,Y.; Ohkuni,Y.; Ogata,E. (Biochem Biophys Res Commun, 1990)