. "\"The modification of histone H3 by the addition of a phosphate group to a tyrosine residue at position 41 of the histone.\" [GOC:bf]" . . "histone kinase activity (H3-Y41 specific)" . "histone tyrosine kinase activity (H3-Y41 specific)" . "histone-tyrosine kinase activity (H3-Y41 specific)" . .