Wiesner R, Acs G, Reich E, Shafiq A
J Cell Biol. 1965 Oct;27(1):47-52. doi: 10.1083/jcb.27.1.47.
The cellular RNA content of mouse fibroblasts incubated with actinomycin decreases at a rate of about 1 to 1.5 per cent per hour, while DNA and protein content remain unchanged. This degradation affects nuclear and cytoplasmic RNA, ribosomal and soluble RNA. The breakdown products appear quantitatively in the acid-soluble fraction of the cells and the medium. Polynucleotides synthesized a short period (120 minutes) prior to exposure to actinomycin are degraded before those synthesized 8 to 12 hours previously.
用放线菌素处理的小鼠成纤维细胞的细胞RNA含量以每小时约1%至1.5%的速率下降,而DNA和蛋白质含量保持不变。这种降解影响核RNA和细胞质RNA、核糖体RNA和可溶性RNA。降解产物定量地出现在细胞和培养基的酸溶性部分中。在接触放线菌素之前短时间(120分钟)合成的多核苷酸比8至12小时前合成的多核苷酸先被降解。