Fig. 4. FcγR engagement of MIH5 isotype variants.
Representative sensograms (A) display interactions of MIH5 WT and MIH5-engineered mAbs (mIgG1, mIgG2a, mIgG2b, mIgA, and mIgG2asilent) for immobilized mFcγRI, mFcγRIIb, and mFcγRIV at increasing concentrations. Binding to FcγR is expressed in resonance units (RU). SPR was performed on four different concentrations of immobilized FcγRs (1, 3, 10, and 30 nM) to determine affinity [Kd(M)] of the Fc variants for the different FcRs (B). n = 3, mean ± SEM. (C) Predicted antibody-dependent cellular cytotoxicity (ADCC) activity for each murine isotype variant on the basis of their differential affinity for FcγRs.