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.
Schematic representation of UPF1 and UPF2 domains. Functional and interacting domains of UPF1 (upper) and UPF2 (lower) are as indicated. The positions of putative caspase-cleavage sites are shown by purple arrows. The amino-acid positions are indicated by a number at the top of each structure
