FBXL10 is a histone demethylase that specifically demethylates 'Lys-36' of histone H3, thereby playing a central role in histone code. It preferentially demethylates dimethylated H3 'Lys-36' residue while it has weak or no activity for mono- and tri-methylated H3 'Lys-36'. FBXL10 is a member of the F-box protein family which is characterized by an approximately 40aa motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. FBXL10 belongs to the Fbls class.