Fig. 3.
RT-PCR analysis of amphotropic receptor (ampho R) mRNA levels in fresh and frozen human cord blood cells. The levels of mRNA encoding ampho R mRNA and β2-microglobulin mRNA in unfractionated (UF) Lin− CD34+ CD38− and Lin− CD34+ CD38+ cells were analyzed as in Fig 2. The level of ampho R mRNA in the HSC-enriched Lin− CD34+ CD38− fraction from frozen cord blood is significantly increased (P < .005) over the level of ampho R mRNA in the HSC-enriched Lin− CD34+ CD38−fraction from fresh cord blood (see Table 2).