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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Arthritis Rheumatol. 2015 Jan;67(1):74–85. doi: 10.1002/art.38878

Figure 2. CD13 is found in vivo and is higher in RA than in OA synovial fluid.

Figure 2

A, CD13 was measured by enzyme-linked immunosorbent assay (ELISA) and enzymatic activity in RA (n=39) and OA (n=59) synovial fluids. B, CD13 was measured by ELISA in sera from healthy controls (n=23), sera from RA patients (n=33) and in synovial fluids from RA patients (n=39, not matched to serum). * p≤0.05, ****p≤0.00001, by One-way ANOVA