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.
Trk-B expression in the human intervertebral disc tissue. Trk-A protein expression was identified in (a), (c) the chondrocyte-like cells nucleus pulposus and inner annulus fibrosus tissue, and (e) the fibroblast-like cells of the outer annulus fibrosus. (b), (d), (f) IgG controls were negative. Scale bar = 50 μm.
