Figure 1: Mutliparameter flow cytometric analysis of expression of surface antigens endoglin/CD105, EphB4, and CD34 by bone marrow ALDHbr cells. (A) ALDHbr cells defined on the basis of high BAAA fluorescence and low side scatter are shown in the oval gate. (B) and (C) show expression of CD105 and EphB4, respectively, and (D) shows co-expression of CD105 and Eph B4 by CD105+ or EphB4+ cells in the ALDHbr gate shown in (A).