ON THE RIBONUCLEIC ACID SYNTHESIZED IN A CELL-FREE SYSTEM OF ESCHERICHIA COLI

Abstract
Ribonucleic acid (RNA) can be continuously synthesized in the 105,000 X g supernatant of Escherichia coli in the presence of 4 ribonucleoside triphosphates, deoxyribonucleic acid (DNA), an energy generation system and salmine-sulfate. The RNA is well protected from degradation by salmine-sulfate. The addition of salmine makes it possible to prepare the "undegraded" RNA by the phenol method. The synthesized RNA behaves essentially like the "undegraded" messenger-RNA. These observations, together with the identity of the base ratios (which are equivalent to those of DNA) of these RNAs support the view that the RNA synthesized in the cell free system is the messenger-RNA.

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