Fig. 7.
Contact with host cells shows increased amounts of surface-expressed adhesins. In this experiment, high iron trichomonads were first incubated with monolayers of immortalized AO VECs before removing and iodinating (see Experimental procedures). Part A shows the same amount of proteins enriched by the ligand assay, as evidenced by the equal intensity of Coomassie brilliant blue stained gels. Autoradiograms in part B illustrate a greater intensity of signal of the surface-labelled proteins of trichomonads after contact with the host cells. Equivalent parasite numbers were used in both samples, which were handled identically. Identical results were obtained with MS74 VECs.