. . . . . . . . . . "a(SCHEM:Superoxides) -> a(CHEBI:\"hydrogen peroxide\")" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "1.4" . "Copper-Zinc (Cu-Zn), manganese (Mn), and extracellular (EC) superoxide dismutase (SOD) are three main isoforms of the enzymatic system that catalyzes superoxide to hydrogen peroxide. These enzymes play a central role in the protection against oxidative stress originated from cellular oxygenases and from mitochondrial sources." . . "Selventa" . . . . "2014-07-03T14:30:51.197+02:00"^^ . . .