Reconstitute at 0.2 mg/mL in sterile PBS. KDM5B is a histone demethylase that demethylates 'Lys-4' of histone H3, thereby playing a central role in histone code. It does not demethylate histone H3 'Lys-9' or H3 'Lys-27'. KDM5B demethylates trimethylated,