Physical mapping of the early region of bacteriophage T7 DNA.

Centrifugation, Density Gradient Chromatography, Ion Exchange Chromosome Mapping Coliphages/analysis DNA, Circular/analysis DNA, Single-Stranded/analysis DNA, Viral/analysis DNA-Directed RNA Polymerases/metabolism Electrophoresis, Polyacrylamide Gel Escherichia coli/enzymology Genetic Code Microscopy, Electron Molecular Weight Nucleic Acid Conformation RNA, Viral/analysis Time Factors Transcription, Genetic Viral Proteins/analysis

DNA, Circular DNA, Single-Stranded DNA, Viral RNA, Viral Viral Proteins DNA-Directed RNA Polymerases