Figure 2.

Distribution of Cr-51 radioactivity after infusion of Cr-51 labeled DsRed-MSC. (A) One hour after intravenous injection, more than 60% of total radioactivity is located in the lungs and approximately 10% in the liver. Other tissues contain only residual radioactivity. After 24 h, the majority of radioactivity is located in the liver. (B) As in (A), but absolute counts shown. Dashed line indicates background radioactivity. Cervical, axillary, inguinal, hepatic, para-aortal, and mesenteric lymph nodes were collected. Average data of 2 experiments is shown.