KRDHMVLLEFVTAAGITHGMDELyKleGGGGSGGGGSGGGGSGGGtsKIS ALKEKISALKEKISALKEAS In one embodiment, the present invention contemplates a demibody comprising an Fab portion (scFv) or derivative thereof, an incomplete, non-functional Fc domain (Cγ2a or Cγ2b) which are members of a binding pair, ...