Figure 3. Pro-Q staining assay of the phospho-proteins in total proteins extracted from Arabidopsis thaliana seedlings and separated by a 2D gel Two-week-old Arabidopsis thaliana seedlings were used for total protein extraction. The total proteins were separated by a 2D gel and the phospho-proteins were stained by Pro-Q (left). The gel was scanned with a Typhoon 9410 fluorescence scanner, and then stained with blue-silver to visualize the proteins (right).