Maintenance of gene expression is not predictable based on initial levels of GFP expression.

Recipient animals were reconstituted with 350 GFP⁺, LT-HSC that initially expressed either low (2 animals) or high levels (3 animals) of GFP 24 hours after stem cell transduction. Peripheral blood was analyzed at 3.5 weeks and 11.5 weeks post-reconstitution.