Figure 1
From: Autoantibodies to BRAF, a new family of autoantibodies associated with rheumatoid arthritis
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Far3165/MediaObjects/13075_2010_9754_Fig1_HTML.jpg)
Autoantibodies to BRAF recognize four linear peptides P10, P16, P25, P33. Anti-BRAF autoantibodies from the sera of 20 RA patients were tested for binding to BRAF peptides by ELISA. After washing, peroxydase conjugated anti-human IgG was added. Optical density was read at 405 nm. Background OD was obtained by adding each serum to a well without peptide. Positive sera were defined by OD value higher than twice background OD (in blue).