Figure 1.
Fragments from FK 506 (Tacrolima) (1–4), sanglifehrin A (5) and cyctochalasin E (6–10).
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.