Complex sentence: The distribution of BmTx3 binding sites is heterogeneous; a high density is found in the caudate--putamen and accumbens nucleus, thalamus, hippocampal formation and cerebellum.
Split into simpler sentences: The distribution of BmTx3 binding sites is heterogeneous. The site density is mainly found important in the caudate--putamen and accumbens nucleus, thalamus, hippocampal formation and cerebellum.