Figure 1.

Common structural elements between MoMLV TM, HIV gp41 and influenza HA₂. The top panel shows schematic maps of the MoMLV, HIV and influenza sequences. For each, the position of the coiled coil is shown in red, and the position of the supporting structures is shown in blue. The bottom panel shows the structures of MoMLV TM residues 45–98 (Fass et al., 1996), HIV gp41 residues 546–581 (Chan et al., 1997), and influenza HA₂ residues 40–129 (Bullough et al., 1994). The interior coiled coils are shown in red, and the exterior supporting structures are shown in blue.