title: Gene amplification in cell-free systems.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D002474:Cell-Free System; D003090:Coliphages / Q000276:immunology; D004247:DNA / Q000302:isolation & purification; D004261:DNA Replication; D012321:DNA-Directed RNA Polymerases; D006168:Guinea Pigs; D006389:Hemagglutinins, Viral; D008239:Lysine; D009975:Orthomyxoviridae / Q000276:immunology; D010400:Penicillin G / Q000276:immunology; D012313:RNA / Q000096:biosynthesis*; D012194:RNA-Directed DNA Polymerase; D012270:Ribosomes / Q000378:metabolism; D013154:Spleen / Q000378:metabolism*; D014020:Tissue Extracts; D010948:Viral Plaque Assay
chemical_list: D000906:Antibodies; D006389:Hemagglutinins, Viral; D014020:Tissue Extracts; D012313:RNA; D004247:DNA; D012194:RNA-Directed DNA Polymerase; D012321:DNA-Directed RNA Polymerases; D008239:Lysine; D010400:Penicillin G