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Table 1 Classification of HLA-DRB1 alleles

From: Validation of the reshaped shared epitope HLA-DRB1 classification in rheumatoid arthritis

Allele classification Amino acid sequence at positions 70–74 HLA-DRB1 alleles
S1 D-E-RAA *0103, *0402, *1102, *1103, *1301, *1302, *1304, *1323
  Q-A-RAA *15
S2 Q-K-RAA *0401
  D-K-RAA *1303
S3D D-R-RAA *1101, *1104, *12, *1305, *1306, *1325, *1422, *16
S3P Q-R-RAA *0101, *0102, *0404, *0405, *0408
  R-R-RAA *1001
X Q-K-RGR *03
  Q-R-RAE *0403, *0407, *0411
  D-R-RGQ *07
  D-R-RAL *08
  R-R-RAE *0901, *1401, *1404
  1. This classification of alleles, observed in our samples, is according to the amino acid sequence at positions 70–74, as described by Tezenas du Montcel and coworkers [6].