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.
Structure of the lck SH2 domain (Eck et al. 1993). The surface loop in SH2 used for insertion is indicated with an arrow. Images were made using the Raster 3D (Bacon and Anderson 1988; Merrit and Murphy 1994) and Molscript programs (Kraulis 1991).
