. "\"Catalysis of the hydrolysis of 5'-phosphotyrosyl groups formed as covalent intermediates (in DNA backbone breakage) between DNA topoisomerase II and DNA.\" [PMID:16751265]" . . "5'-tyrosyl-DNA phosphodiesterase activity" . "See also the molecular function term 'DNA topoisomerase type I activity ; GO:0003917'." . .