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.
Gene expression for matrix metalloproteinase 28 and precursor in vivo in human annulus tissue. Relative gene expression levels for (a) matrix metalloproteinase (MMP) 28 and (b) MMP28 precursor in vivo in human annulus tissue according to grades of disc degeneration. Data presented as the mean ± standard error of the mean. Values inside bars show the number of specimens analyzed for the respective grade of disc tissue.
