obsolete DNA topoisomerase type II (ATP-independent) activity (obsolete GO:0061506)
OBSOLETE. Catalysis of a DNA topological transformation by transiently cleaving a pair of complementary DNA strands to form a gate through which a second double-stranded DNA segment is passed, after which the severed strands in the first DNA segment are rejoined; product release is not coupled to ATP binding and hydrolysis; changes the linking number in multiples of 2.