Abstract
1. To learn the fate of m-RNA, we used the system of "conc. culture 25min.-dil, culture 15min.", characterization of which was shown in the previous paper.
2. About half of the 14C-uracil incorporated into m-RNA during "conc. culture 25mm." was found in r-RNA in "dil. culture 15min.", which was scarcely diluted by extracellularly added 12C-uracil.
3. These results indicate that some m-RNA was incorporated into r-RNA without mixing with acid soluble compounds, while some degraded into the acid soluble pool.
