SLA and autoimmune hepatitis: Furthermore, the amino acid regions 151–170 and 161–180 were the most frequently targeted regions by the T cell clones from patients with AIH, being recognized by 22 and 25 out of 222 clones and by 6 and 7 out of 14 patients, respectively, including all anti-SLA–positive patients (Figure 4D and Supplemental Figure 4).