FIG.2.

FeB-RBD (left) and Fr-RBD (right) structures. This figure was prepared by using Ribbons (11). (A) Ribbon diagram of the two RBD structures, with conserved scaffolds in blue, VRA in red, and VRB in yellow. The strands are numbered according to their order in the primary sequences. Cysteine residues and carbohydrates are shown in a ball-and-stick representation (see Fig. 3). (B) The molecular surfaces of the β-sandwich scaffolds are shown beneath ribbon representations of the variable regions. The view is appoximately from the top of the structure as seen in panel A. Residues on the surfaces of the scaffolds that are identical between FeB-RBD and Fr-RBD are colored blue, and nonidentical positions are white. Cysteine residues in the variable regions are shown in a ball-and-stick representation. Carbohydrates are not shown. (C) The view of the structures rotated 90° around the x axis from their orientations in panel B.