title: Two cell-free systems constructed from Xenopus laevis oocytes: generalized genetic recombination; DNA supercoiling.
mesh_terms: D000818:Animals; D002474:Cell-Free System; D004261:DNA Replication; D004278:DNA, Superhelical / Q000235:genetics*; D004279:DNA, Viral / Q000235:genetics; D005260:Female; D006657:Histones / Q000378:metabolism; D009690:Nucleic Acid Conformation; D009865:Oocytes / Q000201:enzymology / Q000378:metabolism; D011995:Recombination, Genetic; D013539:Simian virus 40 / Q000235:genetics; D014981:Xenopus / Q000235:genetics*
chemical_list: D004278:DNA, Superhelical; D004279:DNA, Viral; D006657:Histones