A DNA repair enzyme
which recognizes and removes dimer
s that have formed between pyrimidine nitrogenous base
s on the same strand as each other, as a result of too much ultraviolet radiation
. The enzyme
can only do this if visible light
is present. It is also called a photoreactivating enzyme
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.