Patent ID: 7888133

Claim:
A cyclic peptide that binds with antibodies obtained from patients with rheumatoid arthritis (RA), which peptide comprises an epitope selected from the group consisting of: 0002-27 H Q K R G Cit G W S R A A (SEQ ID NO: 1) 0002-29 H Q R R V Cit G W S R A A (SEQ ID NO: 2) 0002-31 H Q R R T Cit G G S R A A (SEQ ID NO: 3) 0002-32 H Q R K W Cit G A S R A A (SEQ ID NO: 4) 0002-36 H Q F R F Cit G Cit S R (SEQ ID NO: 5) A A 0002-37 H Q K W R Cit G R S Cit (SEQ ID NO: 6) A A and 0002-63 H Q F R F Cit C W S R A A (SEQ ID NO: 7).