... observed in weaker binders Evaluation of the VH ⁄ VL interaction strength To evaluate the VH ⁄ VL interaction strength of these 36 clones, phages were used to infect a nonsuppressing strain, HB2151, ... strong VH ⁄ VL binder, to describe the relationship, and also to identify key residues in determining the interdomain interaction strength Results Construction of an FR2 combinatorial library To investigate ... evaluating either Fv-antigen or VH ⁄ VL interactions [12] As a target for the analysis, we focused on the two framework region (FR2) regions of VH and VL, each facing the domain interface of the anti-lysozyme...