Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2012 Jul 12;8(7):e1002797. doi: 10.1371/journal.ppat.1002797

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

PMC Copyright notice

(a) Top view of the locations of the three N-terminal helices in the open conformation (as in Figure 10). (b) Top view of the locations of the same helices in the crystal structure (1AIK) of the six-helix bundle formed by the three N- and three C-terminal helices, illustrating the more compact packing in the post-fusion state. (c) Superposition of the arrangement of the three N-terminal helices in the open quaternary Env conformation (cyan) derived from cryo-electron microscopy of soluble trimeric Env with that in the post-fusion conformation (magenta) derived by X-ray crystallography of the six-helix bundle.