title: E. coli sigma factor: a positive control element in phage T4 development.
mesh_terms: D003090:Coliphages / Q000187:drug effects*; D004279:DNA, Viral; D004926:Escherichia coli / Q000032:analysis*; D005815:Genetic Code; D006824:Hybridization, Genetic; D012316:RNA Nucleotidyltransferases / Q000378:metabolism*
chemical_list: D004279:DNA, Viral; D012316:RNA Nucleotidyltransferases