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Table 1 Specific positivity of anticitrullinated protein antibody immunoglobulin G and immunoglobulin M in 113 rheumatoid arthritis patients directed against a set of defined specificities

From: The fine specificity of IgM anti-citrullinated protein antibodies (ACPA) is different from that of IgG ACPA

Epitope IgG (%) IgM (%)
CCP2 100 100
Vim 56 7
Fib-α 33 4
Fib-β 94 40
α-enolase 55 8
Fib 53 40
MBP 63 40
  1. CCP2 = cyclic citrullinated peptide 2; Fib = fibrinogen; IgG = immunoglobulin G; IgM = immunoglobulin M; MBP = myelin basic protein; Vim = vimentin.