Natural Competence in the Hyperthermophilic Archaeon<i>Pyrococcus furiosus</i>Facilitates Genetic Manipulation: Construction of Markerless Deletions of Genes Encoding the Two Cytoplasmic HydrogenasesGina L. Lipscomb, Janet Westpheling, Fei Yang et al.|Applied and Environmental Microbiology|2011Cited by 172