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.
Cartoon depiction of a (A) gap junction plaque, (B) gap junction channel, (C) connexon, and (D) connexin. A subunit from each structure is highlighted in black. Abbreviations are as follows: NT, amino terminus domain; TM, transmembrane 1–4; EL, extracellular loop 1 and 2; CL, cytoplasmic loop; CT carboxyl terminus domain.
