Subcellular localization of SLEEPER proteins from different species in Arabidopsis thaliana cell-suspension protoplasts . A. CYTOSLEEPER:YFP. B. VINESLEEPER2:YFP. C. RICESLEEPER3:YFP. D. DAYSLEEPER:YFP. Images in the left column are bright field images, the middle column depicts the fluorescent image and the right column merged images of the other two columns. The scale bar represents 20 μm.