DNA topoisomerase IIa controls replication origin cluster licensing and firing time in Xenopus egg extracts.
Gaggioli V, Le Viet B, Germe T, Hyrien O. DNA topoisomerase IIa controls replication origin cluster licensing and firing time in Xenopus egg extracts. Nucleic Acids Res. 2013 Aug; 41(15):7313-31.