Figure 2From: Common principles and intermediates of viral protein-mediated fusion: the HIV-1 paradigmIntermediate steps of HIV-1 Env-induced fusion progressing through early (TAS, temperature-arrested stage), bridging (LAS, lipid-arrested stage) and fusogenic pre-bundles toward 6-helix bundles that form after opening of a fusion pore. Membrane-anchored C-peptides capture the extended conformation of gp41.Back to article page