Immunophenotype of UCB CD34⁺ HPCs according to CD45RA expression levels. (A) CD38 and CD7 expression by CD45RA^- (R1), CD45RA^int (R2), and CD45RA^hi HPCs (R3). (B) CD10 and CD7 expression by CD45RA^- (R1), CD45RA^int (R2), and CD45RA^hi HPCs (R3). Prior to labeling, the CD34⁺ HPCs were depleted to less than 10% CD19⁺ pre-B cells. In all cases cells were gated based on expression of CD34 marker (data not shown). Data are from 1 representative experiment of 4.