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. 2013 Apr 2;8(4):e60726. doi: 10.1371/journal.pone.0060726

Figure 2. Representative autoantibody data showing their relative abundance in healthy individuals.

Figure 2

An example of the reactions of four highly prevalent autoantibodies in a population of healthy subjects is presented. The X axis indicates individual samples arranged in order of increasing age from left to right. Relative fluorescence units (RFUs) (Y axis) reflect the resulting antigen-antibody reaction detected on the protein microarrays. Four specific autoantigens [tripartite motif-containing 21 (TRIM21), APEX nuclease (apurinic/apyrimidinic endonuclease) 2 (APEX2), General transcription factor II-I and SERPINE1 mRNA binding protein 1 (SERBP1)] were chosen due to their high prevalence in > 60% of the healthy population. The clear lamination of signal intensities shown by each autoantibody-antigen reaction suggests comparable levels of these autoantibodies in the blood across the population