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CLSM images of BY-2 cells incubated with 55 types of CPP for 3 h at 26 °C. The images are overlays of DIC (gray scale) and TAMRA fluorescence (red). The type of CPP is shown as peptide number as listed in Table 1. The peptide concentration was 100 µg/mL. The cell density was approximately 380 cells/µL. Scale bars, 100 µm.
