Figure 4From: Osteogenic protein 1 in synovial fluid from patients with rheumatoid arthritis or osteoarthritis: relationship with disease and levels of hyaluronan and antigenic keratan sulfateConcentration of hyaluronan and antigenic keratan sulfate in synovial fluid samples. The levels of (a) the hyaluronan (HA) concentration and (b) the antigenic keratan sulfate (KS) in synovial fluid from asymptomatic donors (donor) and from osteoarthritis (OA) and rheumatoid arthritis (RA) patients detected by an ELISA ([21] and [20], respectively). The data are presented as the mean ± standard error of the mean.Back to article page