oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen histone H3K9 demethylase activity FAD-dependent histone H3K9me/H3K9me2 demethylase activity https://github.com/geneontology/go-ontology/issues/21089 https://github.com/geneontology/go-ontology/issues/28520 https://github.com/geneontology/go-ontology/issues/30578 molecular_function Comment: Note that the residue position corresponds to the canonical human H3 histone (UniProtKB:P84243); this residue is conserved across all eukaryotes. Residue 1 is the first residue following removal of the initiating Methionine (Met). Note that each histone is encoded by multiple genes, and sequences may vary across different genes within an organism. histone H3-di/monomethyl-lysine-9 FAD-dependent demethylase activity GO:0140685 2021-07-09T07:18:00Z pg Catalysis of the removal of a methyl group from a di- or a monomethyl-lysine residue at position 9 of the histone H3 protein. This is a flavin adenine dinucleotide (FAD)-dependent amine oxidation reaction. histone H3K9me2 demethylase activity histone H3K9me demethylase activity