⁵¹Cr activity associated with the plasma. The ⁵¹Cr plasma counts, expressed as a percentage of the injected dose, are plotted as a function of time after injection. Panel A corresponds to cells coated with Fog-1 G1 (subjects 2 and 4) and panel B to cells coated with Fog-1 G1Δnab (subjects 1, 3, and 5). ^99mTc plasma counts are not informative (see “Recovery and survival of antibody-coated red cells in subjects 1 through 5”).