Detection of vector sequences in PB from baboon M94123 transplanted with CD34-enriched marrow cells transduced by 72 hours of transduction on BSA (LNX) or on CH-296 (LN) in the presence of IL-6, SCF, FLT3L, and MGDF. (A) PCR analysis of amplified vector sequences early after transplantation. (B) Percentage of vector-positive DNA measured by phosphor image analysis after transplantation.