Additional file 1: Figure S1. of RIG-I expression in perifascicular myofibers is a reliable biomarker of dermatomyositis

Controls used in the study to assess the specificity of the RIG-I antibody. RIG-I antibody was incubated in non-transfected HEK293 cells (left) and in HEK293 cells transfected with the constitutive expression vector pCMV-RIG-I (right). Positivity was only observed in those cells transfected with pCMV-RIG-I. Original magnification × 400. (TIF 3652 kb