SLC2A1 and pancreatic insulinoma: From the fact that neither cytochalasin B nor a large amount of d-glucose could totally abolish the uptake of 2-NBDLG and of 2-NBDG, it may be speculated that MIN6 insulinoma expresses phloretin-sensitive, but non-GLUT, non-stereoselective pathways when forming multi-cellular spheroids.