Y does the African Swine Fever Virus (ASFV) encode its own type II topoisomerase?
It's a really interesting question, and while I don't know the answer to it (yet!), I'll let you know when I find out! In about 3 year´s time...
Just a curiosity: ASFV is one of the few viruses that encode their own topoisomerase II, and of those few, it's the only one capable of infecting mammalian cells.
It's probably best for me to go to work, then...