Fig. 3.

PCNA⁺, βIII-tubulin⁺, and GFAP⁺ cells are located in different regions within the SEL as demonstrated with bright-field immunohistochemical serial sections through the EP, SEL, and CN of a grade 2 HD brain. (a) PCNA⁺ cells are evenly distributed within the SEL (arrows demonstrate examples of PCNA⁺ cell bodies), and the EP is also densely stained. (b) βIII-tubulin⁺ fibers and cell bodies are present in the lower part of the SEL (arrows indicate cell bodies with immunoreactive fibers). (c) GFAP⁺ cells are distributed homogenously throughout the SEL and in the CN (arrows indicate examples of GFAP cell bodies).