Fig. 4: The binding interface between M1R and A129/A138 Fab.

Detailed interactions of the A129 Fab (A) and A138 Fab (B) with M1R. Hydrogen bonds and salt bridges are indicated by dashed lines. M1R is shown in cornflower blue. The heavy and light chains of A129 are shown in dark goldenrod and yellow, respectively. The heavy and light chains of A138 are shown in spring green and green yellow, respectively.