preferred_name: L-arginyl-[protein] + H2O = L-citrullyl-[protein] + NH4(+)
preferred_name_lc: l-arginyl-[protein] + h2o = l-citrullyl-[protein] + nh4(+)
label: L-arginyl-[protein] + H2O = L-citrullyl-[protein] + NH4(+)
label_lc: l-arginyl-[protein] + h2o = l-citrullyl-[protein] + nh4(+)