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Fluorescence microscopy images of compound 4 localization in lysosomes of human PC-3 cells derived from prostate carcinoma. Colocalization of compound 4 (0.5 µM, 24 h) with LysoTracker Green DND-26 (70 nM, 20 min). (A) Bright-field images; (B) localization of compound 4; (C) LysoTracker Green DND-26; (D) merge of the fluorescent images. The scale bars represent 20 µm.
