title: Spectroscopic determination of RNA polymerase promoter sites.
mesh_terms: D003090:Coliphages; D004279:DNA, Viral; D004926:Escherichia coli / Q000201:enzymology; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D013698:Templates, Genetic
chemical_list: D004279:DNA, Viral