Table 2.

Shared epitope classification according to amino acid sequence at positions 70-74

Allele classification	Amino acid sequence positions 70 to 74	HLA-DRB1 alleles
S1	D-E-RAA	*01:03, *04:02, *11:02-:03, *13:01-:02, *13:04, *13:36, *13:40
	Q-A-RAA	*15
S2	Q-K-RAA	*04:01, *04:09, *04:13, *04:35, *04:66
	D-K-RAA	*13:03
S3D	D-R-RAA	*11:01, *11:04, *11:27, *12, *13:05-:06, *13:25, *14:22, *16
S3P	Q-R-RAA	*01:01-:02, *04:04-:05, *04:08, *04:10
	R-R-RAA	*10:01
X	Q-K-RGR	*03
	Q-R-RAE	*04:03, *04:07, *04:11
	D-R-RGQ	*07
	D-R-RAL	*08
	R-R-RAE	*09:01, *14:01, *14:04

HLA = human leucocyte antigen. Data in right column from Gao et al. [6].