= Robert G. Roeder
{c}
<Robert G. Roeder> investigates <transcription> and its regulation. His 1974 study with <Roberto Weinmann> helped identify which <RNA polymerase> produces <transfer RNA> and <5S ribosomal RNA>. The researchers compared sensitivity to <alpha-amanitin> in transcription by isolated <cell nuclei> with the sensitivities of separated polymerase activities.<Role of DNA-Dependent RNA Polymerase III in the Transcription of the tRNA and 5S RNA Genes by Roberto Weinmann and Robert G. Roeder>[Abstract: inhibitor-response comparisons in nuclei and separated polymerases]{ref}
Matching these responses supported the role of <RNA polymerase III>. The experiment connected production of particular <RNA> products to a biochemical activity, instead of assuming that every gene in a <cell nucleus> is transcribed by the same enzyme.
\Image[https://www.rockefeller.edu/uploads/www.rockefeller.edu/sites/4/2020/03/Roeder_2400x1200.1585246326.jpg]
{title=Portrait of <Robert G. Roeder>}
{description=Portrait linked from the identified Rockefeller University laboratory profile.}
{source=https://www.rockefeller.edu/our-scientists/heads-of-laboratories/895-robert-g-roeder/}
{width=260}
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