ceQORH lacking its CaM-binding domain is targeted to chloroplasts in epidermal cells. Confocal microscopy was performed on plants stably expressing the following: A, GFP (GFP alone as a negative control of plastid localization; bar, 8 μm). B, TP-GFP (transit peptide of the small subunit of RuBisCO fused to GFP as a positive control of plastid localization; bar, 8 μm). C, ceQORH-GFP (plant ceQORH fused to GFP; bar, 10 μm). D, Mut2-ceQORH-GFP (ceQORH lacking its CaM-binding domain; bar, 5 μm). GFP, GFP fluorescence. Chlorophyll, chlorophyll autofluorescence. Overlay, overlay of all three channels.