FIG. 8.

The total amount of ¹⁴C-labeled E. coli cells which attached and became ingested by the trophozoites, as determined after removal of the nonattached bacteria by Percoll gradients (10), is depicted using filled bars. The percentage of radiolabeled bacteria (out of the total attached) which solubilized after treatment of trophozoite samples with Triton x-100 is depicted using empty bars. Left bar pair, strain HM-1:IMSS; center bar pair, transfectant psAP-2, right bar pair, transfectant psAP-4.