FIG. 5.
Stereoview of three peptides bound to Fab 2219. The peptides (MN [yellow], UR29 [pink], and UG1033 [cyan]) were superimposed using only their respective Fab coordinates. ArgP315 (MN and UG1033) and ArgP312 make comparable interactions with the Fab fragment. Note the slight movement of PheP317 in response to the Ile→Leu mutation at P309 in the UG1033 structure.