Figure 4.

Scatter plots comparing log₂ protein abundance between two differentiation stages of tomato fruit plastids. A, MG versus B. B, B versus R. C, MG versus R. Shades of gray represent proteins that are equally abundant in both stages; open squares correspond to proteins overexpressed at the MG stage; open circles are proteins overexpressed at the B stage, and open triangles represent proteins overabundant at the R stage. Data along the axis of the scatter plots indicate proteins that have been quantified at one of the two stages only and totally absent at the other stage. Numbers correspond to the number of proteins in each category. To draw the graphs, a log₂ value of −17 was arbitrarily affected to proteins for which no abundance value was available in Supplemental Table S2.