Preparation of RNA transcripts of discrete segments of DNA.

Base Sequence Chromatography, Gel Chromatography, Thin Layer Coliphages/metabolism DNA, Circular DNA, Viral DNA-Directed RNA Polymerases Electrophoresis, Polyacrylamide Gel Genetics, Microbial Methods Nucleic Acid Denaturation Phosphorus Radioisotopes RNA, Transfer/biosynthesis RNA, Viral/biosynthesis RNA-Directed DNA Polymerase Ribonucleotides Simian virus 40 Transcription, Genetic

DNA, Circular DNA, Viral Phosphorus Radioisotopes RNA, Viral Ribonucleotides RNA, Transfer RNA-Directed DNA Polymerase DNA-Directed RNA Polymerases