Photolyase

Photolyase is a flavoprotein, as it requires the cofactor flavin.

Photolyase is found in many living beings but not in mammals. Its function is to repair damage to DNA pyrimidine bases caused by ultra-violet sunlight.

Its mechanism of action has been extensively studied and requires transfer of an electron and a proton between the enzyme and DNA after the photolyase has been activated by blue or ultra-violet light.