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胚胎鸡脑微粒体部分中的内源性DNA指导的DNA合成系统。

Endogenous DNA-directed DNA synthesising system in a microsomal fraction of embryonic chick brain.

作者信息

Smith J, Soriano L

出版信息

Nucleic Acids Res. 1977 Mar;4(3):641-8. doi: 10.1093/nar/4.3.641.

Abstract

A DNA polymerising complex directed by endogenous DNA has been partially purified from 11-day-old embryonic chick brain microsomes by DEAE-cellulose and phosphocellulose column chromatography. The active fractions are eluted together with an exogenous DNA-directed DNA polymerase; after Sephadex gel filtration, the endogenous activity remains associated with a high molecular weight DNA-directed DNA polymerase. The endogenous activity of the complex has been shown to be RNase-resistant and actinomycin-sensitive. It requires potassium, an ATP-regenerating system and all four deoxyribonucleoside triphosphates for full activity. The significance of this activity with regard to the protovirus hypothesis is discussed.

摘要

通过二乙氨基乙基纤维素(DEAE -纤维素)和磷酸纤维素柱层析法,已从11日龄鸡胚脑微粒体中部分纯化出一种由内源性DNA指导的DNA聚合酶复合物。活性组分与外源性DNA指导的DNA聚合酶一起被洗脱;经葡聚糖凝胶过滤后,内源性活性仍与一种高分子量的DNA指导的DNA聚合酶相关联。已证明该复合物的内源性活性对核糖核酸酶(RNase)具有抗性,而对放线菌素敏感。它需要钾、一个ATP再生系统以及所有四种脱氧核糖核苷三磷酸才能发挥完全活性。本文讨论了这种活性对于前病毒假说的意义。

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2
DNA polymerase activities in brain of chick embryo.
FEBS Lett. 1972 May 15;22(3):310-314. doi: 10.1016/0014-5793(72)80258-8.
4
A chemical model for transcriptional initiation of DNA replication.DNA复制转录起始的化学模型。
Biochem Biophys Res Commun. 1972 Feb 16;46(3):1354-60. doi: 10.1016/s0006-291x(72)80124-4.
8
RNA-primed DNA synthesis in vitro.
Proc Natl Acad Sci U S A. 1972 Jun;69(6):1560-4. doi: 10.1073/pnas.69.6.1560.

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