title: New physical map of bacteriophage T5 DNA.
abstract: The locations of 103 cleavage sites, produced by 13 restriction endonucleases, were mapped on the DNA of bacteriophage T5. Single- and double-digest fragment sizes were determined by agarose gel electrophoresis, using restriction fragments of phi X174 DNA and lambda DNA as molecular weight standards. Map coordinates were determined by a computer-based least-squares procedures (J. Schroeder and F. Blattner, Gene [Amst] 4:167-174, 1978). The fragment sizes predicted by the final map are all within 2% of the measured values. Based on this analysis, T5st(+) DNA contains 121,300 base pairs (Mr, 80.3 X 10(6) and has a terminal repetition of 10,160 base pairs (Mr, 6.7 X 10(6)). Restriction endonuclease analysis after treatment with exonuclease III and a single-strand-specific endonuclease allowed precise localization of five of the natural single-chain interruptions in T5 DNA. Revised locations for several T5 deletions were also determined.
mesh_terms: D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000032:analysis*; D005814:Genes, Viral; D009154:Mutation; D012091:Repetitive Sequences, Nucleic Acid; D013604:T-Phages / Q000235:genetics*
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes