Seed J
J Cell Biol. 1966 Feb;28(2):257-61. doi: 10.1083/jcb.28.2.257.
Interferometric and photometric measurements have been made on replicating mouse ascites tumor cell cultures. From a study of the relations between successive physical measurements on individual cells, it was found that whereas the net syntheses of nuclear RNA and nuclear protein are closely associated during interphase, they are dissociated from DNA replication to a significant extent. These results agree with others reported in replicating cell strains derived from tumors. In auxiliary experiments an attempt was made to block the initiation of DNA synthesis by X-irradiation: although large amounts of nuclear protein accumulated in some cells in the absence of DNA synthesis, the inability to hold the DNA block for an interphase time prevented a quantitative analysis of the results.
已对复制中的小鼠腹水肿瘤细胞培养物进行了干涉测量和光度测量。通过对单个细胞连续物理测量之间关系的研究发现,在间期,核RNA和核蛋白的净合成密切相关,但它们在很大程度上与DNA复制解离。这些结果与从肿瘤衍生的复制细胞系中报道的其他结果一致。在辅助实验中,试图通过X射线照射来阻断DNA合成的起始:尽管在没有DNA合成的情况下一些细胞中积累了大量核蛋白,但无法将DNA阻断维持一个间期时间,从而妨碍了对结果的定量分析。