“…RLS are biologically important, because they modify proteins associated with signal transduction (18,51,90), energy production (21), mitochondrial respiration (33,46), and cell death pathways (36,42,45,89). At low levels, many RLS play a role in cell signaling events (16,25,91,96) and in this case, control the formation of reactive oxygen species (ROS)/reactive nitrogen species (RNS) and have a protective role (5,28,37,101). However, in pathology, the role of RLS changes dramatically.…”