Involved in redox regulation of the cell. Acts as an antioxidant. Inhibits TNFSF11-induced NFKB1 and JUN activation and osteoclast differentiation. May affect bone resorption and help to maintain bone mass (By similarity). The active site Cys-88 corresponds to one of the redox-active cysteines of peroxiredoxins. Belongs to the peroxiredoxin-like PRXL2 family. PRXL2A subfamily. Truncated C-terminus.