Fig. 5. Cell surface expression of CD41 on cells co-expressing CD34 and Kit. CD34 (y axis) and Kit (x axis) staining of (A) E9.5 yolk sac, (B) E12.5 fetal liver and (C) bone marrow cells revealed co-expression of these antigens (number in upper right corner of A-C indicates percentage of total events). (D-F) Analysis of the cells co-expressing CD34 and Kit revealed CD41 expression in (D) most E9.5 yolk sac cells, (E) lower CD41 expression in E12.5 fetal liver cells, and (F) limited CD41 expression on adult marrow cells. These are representative data from 5 experiments.