Figure 4: Immunofluorescent staining of EPOR in two cultures of hTECs that show an epoetin delta-induced effect on oxidative stress (a) or not (b). EPOR signal is visualized using the M-20 anti-EPOR antibody and an FITC-labeled (green fluorescence) secondary antibody. Punctate intracellular staining is seen in both cultures while membranous staining is only seen in cultures that showed epoetin delta-induced effects on oxidative stress.