Figure 1 - Whole body radioautographs showing the distribution of total (A) and nonspecific (B) insulin-binding sites in mice 3 min after ¹²⁵I-insulin injection. The mice were injected intravenously with 185 kBq of ¹²⁵I-insulin (porcine, ¹²⁵I-Tyr^A14 insulin dissolved in Ringer solution at a concentration of 185 kBq/0.4 ml) in the absence (A) or presence (B) of excess (50 µg) unlabeled insulin. Bar = 1 cm.