VER2 and O-GlcNAc Signaling Figure 5. Confocal images of VER2-GFP fusion protein and GFP overexpressed in leaf epidermis and veins in Arabidopsis. At least 6 independent transgenic plants expressing VER2-GFP and GFP were analyzed. GFP fluorescence is shown in the green channel. Propidium Iodide (PI) fluorescence is shown in the red channel. (A) Localization of GFP alone in epidermal cells. (B) Localization of VER2-GFP fusion protein in epidermal cells. The arrowheads point to punctate distribution of VER2-GFP. (C) An enlarged image of VER2-GFP fusion protein in epidermal cells. The arrowheads point to punctate distribution of VER2-GFP. Nuclear and perinuclear distributed VER2-GFP was labeled with an arrow. (D), (E) and (F) Enlarged images of fluorescence of nuclear and perinuclear distributed VER2-GFP in leaf epidermal cells. The nucleus in (D) was stained with PI and PLoS ONE | www.plosone.org 6 March 2009 | Volume 4 | Issue 3 | e4854