Expression of phenotypic markers after transplantation with human cord blood cells cultured in the presence of HOXB4 and DL. In general, engraftment of human cells as evidenced by percent GFP⁺ (A), percent CD45⁺ and CD45⁺GFP⁺ (B), and percent CD34⁺CD45⁺ and CD34⁺GFP⁺ (C) is highest when HOXB4 and DL are used in conjunction. n = 5 mice per experimental treatment, *P < .05