Figure 1

Characteristics of labeled donor cells. Isolated BM cells harvested from donor mice were labeled with QDs, which have an emission peak at 655 nm. A representative image illustrating a labeled cell emitting red fluorescence as observed under confocal microscopy is shown (A) and the red signal was confirmed as QDs by measuring their emission wavelength (B). Both the whole BM and Lin- progenitor cell populations were labeled with quantum dots and the labeling efficiency was 79.9 ± 3.4% and 75.5 ± 2.9%, respectively (C). Data is shown as mean ± SE, n = 5. Scale bar is 5 μm.