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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Arthritis Rheum. 2012 Sep;64(9):2917–2926. doi: 10.1002/art.34520

Figure 4.

Figure 4

Effect of joint injury on PRG4 (A, B) and SAPL (C, D) in NL-eSF (n=19–20), AI-eSF (n=10), and CI-eSF (n=10) (A) Representative PRG4 Western blot probed with an antibody to Lubricin/PRG4; (B, D) concentrations of PRG4 (μg/ml) and SAPL (mg/ml), respectively; and (C) spectrophotometric absorption profiles for the reaction products of SAPL from pooled NL-eSF, CI-eSF, and AI-eSF. Data are mean ± SEM, and differing letters indicate significant differences between groups at p<0.05 or p<0.001.