Fig. 1.

Effect of ATP and BzATP on cell survival as determined by MTT viability assays. Retinal cultures at E7C2 cultivated in complete medium were incubated with increasing concentrations of ATP or BzATP a, c for 3 h or with 3 mM ATP and 0.1 mM BzATP for increasing periods of time (b, d). After this period, MTT assays were performed as described in “Methods.” Data represent the mean ± SEM of at least three separate experiments performed in triplicate. **P < 0.01 compared with control