Rapidly Labelled RNA in Tetrahymena pyriformis

Abstract
39‐S, 29‐S and 18‐S nuclear rRNA precursors of Tetrahymena pyriformis have been characterized by acrylamide gel electrophoresis. Evidence is presented for the presence of high‐molecular‐weight non‐methylated RNA species (28 – 39 S, Mr range 1.9 – 2.7 × 106) in the cytoplasm of this protozoa.