Table 1.

Tapasin genotypic distributions in systemic onset juvenile rheumatoid arthritis families

Tapasin genotypes	US healthy control individuals	US healthy siblings of SoJRA	US SoJRA	UK SoJRA	UK and US SoJRA
0101	35 (31.0%)	26 (28.0%)	49 (36.6%)	23 (30.0%)	72 (34.4%)
0102	56 (49.5%)	50 (53.7%)	63 (47.0%)	45 (60.0%)	108 (51.6%)
0202	22 (19.5%)	17 (18.3%)	22 (16.4%)	7 (9.2%)	29 (14.0%)
01 allele frequency	0.56	0.55	0.6	0.6	0.6
02 allele frequency	0.44	0.45	0.4	0.4	0.4
Total	113	93	134	76	209

Tapasin 01 allele is Arg260, and 02 is Thr260. SoJRA, systemic onset juvenile rheumatoid arthritis.