List of identification results for the proteins that were differentially expressed between the normal NG108-15 cells and the senescent NG108-15 cells.

a. According to SWISS-PROT DE line.b. SWISS-PROT accession number.c. Ratio of matched peptides with total PMF peptides.d. Percent of identified sequence to the complete sequence of the known protein.e. The increased or decreased expression protein levels in the Senescent NG108-15 cells as compared to the Normal NG108-15 cells and (±) indicates identical spot intensity in the two gels.f. The p-value was statistically analyzed by student t-test analysis between Normal NG108-15 cells and NG108-15 cells.g. The quantity (mean ± SE) of each protein spot was calculated using 2-DE gels.