For the α chain, Trav10 [S26], Trav16n [S20,26], Trav17 [S27], Trav5‐4 [S26], Traj42 [S20,26] and Traj53 [S26] were associated with Type I diabetes, whereas Trav12‐2 [S28] was associated with primary biliary cholangitis. This evidence concerns the gene TRAJ53 and primary biliary cholangitis.