PADI4 and autoimmune disease: Still, our data shed light on the regulatory effect that PADI4 inhibitors could have on citrullination of proteins, including β-actin (Fig. 3g), enolase (Extended Data Fig. 3g) and myelin basic protein (MBP) (Extended Data Fig. 3h)4,47,48, that are commonly citrullinated in autoimmune diseases.