Toward the goal of dual-antigen targeting for MM, a CAR incorporating a truncated “a proliferation-inducing ligand” (dAPRIL) as the ligand-binding domain had previously been reported to interact with both BCMA and another MM marker, the transmembrane activator and CAML interactor (TACI)13. The gene discussed is TNFRSF17; the disease is Miyoshi myopathy.