Figure 6.

Loss in cell viability of ex vivo propagated erythrocyte progenitor cells caused by Stx2a at intermediate stages of maturation. Cell culture aliquots were taken from the different developmental stages during the cultivation of 15 days (d) (see Figure 4 and Figure 5) and exposed for 48 h to increasing Stx2a concentrations of 0.1 ng/mL, 1 ng/mL, and 10 ng/mL or kept in cell culture medium without toxin (control). Cell viability triple determinations were performed in relation to control cells and are provided as percent values. Colored full circles indicate the three donors: red marks donor 1, green donor 2, and blue donor 3 as indicated ([145], modified).