TABLE 5

A comparison of ¹²⁵I-α-conotoxin MII binding in three thalamic areas of control rats and mice The thalamic cuts (see Materials and Methods) were further sectioned into approximately 10% of the lateral thalamic, 60% of the dorsal thalamic, and 30% of the subthalamic material. The binding of ¹²⁵I-Cntx to particulates (total and nonspecific; n = 6 for each) was performed as described in Table 4. The results are expressed as fmol ¹²⁵I-Cntx specifically bound per mg particulate protein. The binding to rat particulates was for each area significantly higher (^*, p < 0.05 in t tests) than in the corresponding mouse particulates. The binding to particulates from dorsal hypothalamic area was in both species significantly larger (†, p < 0.05 in t tests) than that for the other two areas of the species.