Relative quantitation of ribosomal phosphopeptides isolated from leaves harvested at day or night.

Lowercase s in the sequences designate phosphorylated serine residue with the superscript numbers corresponding to the amino acid position in the protein. The data are averages (+/- standard deviation) from four LC-MS runs corresponding to the two day and two night preparations (Table S2) and two types of labeling for each day/night pair (see Figure 1). * and ** represent statistically significant increase at P <0.05 and P <0.01, respectively, by Student's t test.