Critical interactions between the SARS coronavirus (SCV) envelope (spike, S) glycoprotein and a neutralizing antibody m396. The SCV is illustrated as a red loop; the heavy and light chains of the antiboby are shown as molecular surfaces in orange and cyan, respectively. Side chains are displayed as stick models in atomic color scheme: carbon in green, nitrogen in blue, and oxygen in red. The two side chains from the antibody are outlined with meshes drawn at van der Waals radii (Prabakaran, Gan, Feng, Zhu, Choudhry, Xiao, Ji, and Dimitrov, J. Biol. Chem. 2006; 281:15829-15836. Abstract).