Fig. 4.
Specificity of labeling produced by the pre-embedding immunogold-silver CB immunocytochemistry. (A–D) Electron micrographs depicting CB+ dendritic profiles. They can be easily identified because of the high concentration of gold particles in their confines, with little or no background labeling. Many dendritic profiles in the same electron micrographs are completely devoid of gold particles (CB−).