Kahn et al. [38] observed that the levels of glucose transporters types 1 and 4 (GLUT1 and GLUT4) are progressively decreased in muscles of STZ-diabetic rats with the extent of the diabetes, although in this present study a reduction in GLUT4 content in muscle plasma membrane of diabetic rats (DYOG) in comparison with normal rats (NYOG) was not found, after a glucose overload (Figure 5(b)); these differences may be due to periods of diabetes studied (Kahn study: 7–14 days; present study: 19 days). Here, SLC2A1 is linked to diabetes mellitus.