Nuclear localization of RR13 and RR16 in C. roseus cells. Cells were transiently transformed with RR13-GFP (A-D) or RR16-GFP (E-H) expressing vectors in combination with the nuclear-mcherry marker (B, F). Co-localization of the two fluorescence signals is shown in the merged image (C, G). The morphology was observed by differential interference contrast (DIC) microscopy (D, H). Scale bar = 10 μm.