抄録
Several reports have recently been accumulated (Refiner and Goodman, 1955; Hunter and Butler, 1956; Kramer and Straub, 1956), that the RNA extracted either from induced or the enzyme-containing cells can bestow on non-induced cells the capacity to form the inducible enzyme. These results suggest that a specific RNA preformed can participate in the synthesis of a specific protein. On the other hand, chloramphenicol (CM) inhibited protein but not nucleic acids synthesis in E. coli (Wisseman et al., 1954) . And the RNA synthesized in the presence of CM was stabilized when the cells were washed to remove CM and resuspended in a complete medium containing amino acids (Aronson and Spiegelman, 1958; Horiuchi et al., 1958) . It seems to be possible that the RNA synthesized in the presence of CM is capable to form some enzymes or to accerelate protein formation during the process of this resuspension.
In this report, we tested whether or not the RNA synthesized in the presence of CM participates in the formation of β-galactosidase (induced enzyme formation system), alkaline phosphomonoesterase (repressed enzyme formation system) and of non-specific protein (constitutive protein formation system) . The results showed that the RNA did not participate in the formation of these enzymes and of the protein. A preliminary account of this paper was reported previously (Horiuchi et al., 1957) .
