IGFBP2 and rheumatoid arthritis: We focused on two peptides, the first (YNQLLRcitrIEEELGSKAK) derived from α-enolase and the second from the FUSE-BP proteins, a peptide similar to FUSE-BP1 and FUSE-BP2 that is certainly the most interesting candidate autoantigen since the others were previously shown to be recognized by RA sera.