In the article titled “Melatonin Suppresses the Expression of 45S Preribosomal RNA and Upstream Binding Factor and Enhances the Antitumor Activity of Puromycin in MDA-MB-231 Breast Cancer Cells” [1], there was an error in Figure 3(a), where the fifth lane (Mcl-1) was mistakenly duplicated with the sixth lane (Cyclin D1), due to a production error. The correct figure is shown below.