Analyses of Fc/Fc receptor interactions using recombinantly expressed extracellular domains of different Fcγ receptors. Binding profiles of 2F8-C (●) and 2F8-H (○) to various Fcγ receptors were measured by ELISA. 2F8-C F(ab′)2 fragments (▼) are shown as a control. The mean values are presented. One representative experiment of 3 is shown.