Blood smears showing transgenic rescue of thrombocytopenia. (A) A/J +/+ +/+ with normal-sized platelets, (B) A/J-trac/trac +/+ with enlarged platelets, (C) A/J +/+ Tg (ABCG5/8) with normal-sized platelets, and (D) A/J-trac/trac Tg (ABCG5/8) with normal-sized platelets. Bar represents 10 μm.