Detection of neurodegeneration in the rat brain of a model for Huntington’s disease.  40 µm cryostat section was cut coronally through the striatum of a rat that received a focal injection of quinolinic acid. The section was processed first for bcl2-immunoreactivity and then for detecting neuronal damage with FD NeuroSilver™ Kit I. Note that degenerating neurons (black) intermingle with survived bcl2-positive neurons.