title: Evidence for two mechanisms for DNA unwinding catalyzed by DNA helicases.
mesh_terms: D004265:DNA Helicases / Q000378:metabolism*; D004279:DNA, Viral; D004926:Escherichia coli / Q000201:enzymology*; D005092:Exonucleases / Q000378:metabolism; D007700:Kinetics; D008970:Molecular Weight; D013379:Substrate Specificity; D013604:T-Phages / Q000201:enzymology*
chemical_list: D004279:DNA, Viral; D005092:Exonucleases; D004265:DNA Helicases