Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Tyrosine hydroxylase-positive cells (arrows) in the substantia nigra of rats with experimentally induced Parkinson's disease (immunohistochemical staining, × 100).
(A) The substantia nigra not injected with 6-hydroxydopamine.
(B) The substantia nigra injected with 6-hydroxydopamine.
