Higher in vivo marking levels with Phoenix-GALV–derived vectors than with PG13-derived retroviral vectors in nonhuman primates.

(A) Representative example of a flow cytometric analysis of a control animal (no transplant; left panel) and animal F99070 on day 25 after transplantation (right panel). (B-D) Detection of transgene expression over time by flow cytometry in the peripheral blood of 3 baboons transplanted with transduced CD34-enriched marrow. F99070 (B), 00021 (C), A00066 (D).