用染料配体亲和色谱纯化DNA聚合酶αPurification of DNA Polymerase α by Dye Ligand Affinity Chromatography
徐德明,李碧羽,陈石根
Xu Deming;
摘要(Abstract):
将7712系正常小鼠的胸腺、肝、脾等制成匀浆,经37000×g离心,所得上清液用平衡缓冲液透析后,通过三嗪蓝色染料-琼脂糖(Sepharose4B)亲和色谱,用氯化钠溶液梯度洗脱,获得较纯的DNA聚合酶α,比活性为340U/mg,提纯倍数为18.7,回收率为69.2%,表明:采用染料配体亲和色谱从匀浆中分离纯化DNA聚合酶α,其所得产率高,方法简便快速,色谱柱可反复使用。
Normal cells were collected from thymus,liver and spleen of 7712 mice,then homogenized with ultrasonication.The homogenate was centrifugalized in 37 000×g and collected the supernatant dialysed against the buffer. Afterwards, the solution was treated with affinitychromatograph)in Cibacron blue dextran-Sepharose 4B column.The activity of DNA polymerase αin the supernatant and the eluant were measured with tritiated deoxyadenosine triphosphate(3HdATP),i.e,radioisotopic enzyme assay.At the same time,the protein in the supernatant and the eluant were determined by ultraviolet absorption spectrometry. Separately, specific activity in the supernatant is 18.2 U/mg and in the eluant is 340 U/mg. Purifing multiple is 18.7,yield is 69.2%. The above-mentioned method is simple, quick and practical to extraction and purification of DNA plolymerase α.
关键词(KeyWords):
脱氧核糖核酸聚合酶Ⅱ类,亲和色谱法
DNA polymerase Ⅱ; chromatography agarose
基金项目(Foundation):
作者(Authors):
徐德明,李碧羽,陈石根
Xu Deming;
DOI: 10.19367/j.cnki.1000-2707.1994.04.004
文章评论(Comment):
|
||||||||||||||||||
|
||||||||||||||||||