label: histone H1R54 arginine deiminase activity
label_lc: histone h1r54 arginine deiminase activity
description: "Catalysis of the reaction: H2O + histone H1 L-arginyl (position 54)= histone H1 L-citrullyl (position 54) + NH4+, resulting in histone H1 citrullination at position 54."