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.
Each value represents the mean ± S.D. for eight independent experiments performed separately. Significant differences are indicated by Tukey’s HSD (**P<0.01).
