Studies Concerning the Mechanism by which Translational‐Control RNA Regulates Protein Synthesis in Embryonic Muscle

Abstract
Muscle translational‐control RNA (tcRNA) has been separated into two classes, polysomal and messenger ribonuclear protein (mRNA · protein), which have different sizes as determined by acrylamide gel electrophoresis. While normally translation of mRNA · protein mRNA is inhibited by tcRNA derived from the same mRNA · proteins, this inhibition does not occur if the messenger is previously de‐adenylated. This suggests that the poly(A) segment of mRNA is required for the tcRNA activity. Utilizing different mRNA · protein fractions from muscle, myosin mRNA · protein and small mRNA · proteins (1 and T2 RNase.