title: Derivatives of guanosine triphosphate-photoreactive substrates of Escherichia coli RNA polymerase.
mesh_terms: D000345:Affinity Labels; D001345:Autoradiography; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism* / Q000528:radiation effects; D004926:Escherichia coli / Q000201:enzymology*; D006160:Guanosine Triphosphate / Q000031:analogs & derivatives*; D010777:Photochemistry; D014466:Ultraviolet Rays
chemical_list: D000345:Affinity Labels; D006160:Guanosine Triphosphate; D012321:DNA-Directed RNA Polymerases