Figure 1.
Density fractionation of control and uninfected erythrocytes. Cells were banked at 4°C for the indicated time and then maintained at 37°C for 72 hours in the presence or not of P falciparum parasite before fractionation on Percoll/sorbitol gradient. Data were analyzed by 2-way analysis of variance. ⋄indicates control RBCs (NRBCs); □, uninfected RBCs (URBCs). Young URBCs versus young NRBCs, ○ indicates P < .01; old URBCs versus old NRBCs, *P < .003.