To further determine whether CPXV14 interfered with FcγR activation by antibodies we used a panel of reporter cell lines based on mouse BW5147 thymoma cells that express the ectodomains of murine FcγRI, FcγRIIB, FcγRIIII and FcγRIV fused to the CD3-ζ-chain signaling module. Here, FCGR2B is linked to thymoma.