Fig. 1.

Stereo-ribbon diagram of residues 6–112 of the conformer closest to the mean coordinates of the bundle of 20 protein conformers used to represent the NMR structure of the SARS-CoV NAB (Serrano et al. 2009). The regular secondary structures and the two residues P6 and K112 are identified. The molecular model was generated using the atomic coordinates deposited in the protein data bank, id 2K87