FIG. 4.

Differentiation of EGFP lentivirus-transduced human preosteoclasts. Uninfected cells (control) were compared to the cells infected once (day 6) and infected twice (both days 6 and 7). EGFP-transduced cells were sorted at 10 days post-transduction. The TRACP assay was performed at 21 days posttransduction. The means and standard deviations were from three experiments.