BBS2001 Threats and Defence Mechanisms: what are the most important enzyme antioxidants and what do they do?

Question

what are the most important enzyme antioxidants and what do they do?

Mirte Schattorie · Accepted Answer

catalase: converts hydrogen peroxide into water and oxygen 
2 H2O2 → 2 H2O + O2

superoxide dismutase
ROOH + 2 GSH → GSSG + H2O + ROH

glutathione peroxidase: converts superoxide into hydrogen peroxide
O2 - + O2 - + 2H+ → H2O2 + O2

What are the most important enzyme antioxidants and what do they do?