arachidonate 12(R)-lipoxygenase activity
Catalysis of the reaction: arachidonate + O2 = (5Z,8Z,10E,12R,14Z)-12-hydroperoxyicosa-5,8,10,14-tetraenoate.
GO:0016702
oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen
is_a