Figure 4. Relative abundance of histone H2A family in proliferating and bleomycin-treated cells. The AGLQFPVGR and HLQLAIR peptide sequences are common to all H2A histone family types (3A). The relative nuclear abundance of both the peptides, as measured by SRM, is shown for proliferating, acute DNA damage, and drug-evoked senescence HCA2 cells. Eight biological replicates were used for each condition. The p-values were calculated using Student's t-test, two-tailed, unequal variance, between the conditions.