title: Evidence that there are two basically different types of protein present in calf thymus, which stimulates the DNA dependent RNA polymerase reaction.
mesh_terms: D000818:Animals; D004247:DNA; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism*; D004926:Escherichia coli / Q000201:enzymology*; D006657:Histones / Q000302:isolation & purification / Q000494:pharmacology*; D007700:Kinetics; D008970:Molecular Weight; D009698:Nucleoproteins / Q000302:isolation & purification / Q000494:pharmacology*; D012319:RNA Polymerase II / Q000378:metabolism; D013950:Thymus Gland / Q000201:enzymology / Q000502:physiology*
chemical_list: D006657:Histones; D009698:Nucleoproteins; D004247:DNA; D012319:RNA Polymerase II; D012321:DNA-Directed RNA Polymerases