Figure 3. Dose response curve showing the effect of hexadecyloxypropyl cytarabine 3’,5’-cyclic monophosphate (HDP-cP-Ara-C) and hexadecyloxypropyl cytarabine 5’-monophosphate (HDP-P-Ara-C)on human retinal pigment epithelium (ARPE-19) cells and rat Müller (rMC-1) cells proliferation. The y-axis represents the fraction of mean optical density (OD) values of testing wells for the compounds by the mean OD values of the cells for medium control using WST-1 or XTT cell proliferation assay.