RAC2 and Autoimmunity: In the active lesion-specific biggest network (n = 43 with 60 connections), the ten major hubs were SH2B3, RAC2, RAB23, ANXA2, SMURF1, TGFB1L1, TRIM38, TNFAIP3, CSF2RB and PRKCZ reflecting processes involved in autoimmunity risk and immune responses (Fig. 6a).