histone H2AS121 kinase activity https://github.com/geneontology/go-ontology/issues/28520 https://github.com/geneontology/go-ontology/issues/30583 histone kinase activity (H2A-S121 specific) Catalysis of the reaction: histone H2A-serine (position 121) + ATP = histone H2A-phosphoserine (position 121) + ADP. This reaction is the addition of a phosphate group to the serine residue at position 121 of histone H2A. This serine residue is present inthe histone H2A of fungi and Tetrahymena. This position corresponds to T120 in metazoa. histone serine kinase activity (H2A-S121 specific) histone-serine kinase activity (H2A-S121 specific) histone H2A-S121 kinase activity 2010-11-16T03:42:59Z mah molecular_function GO:0072371 histone H2A kinase activity