同柱串联凝胶过滤从重组人肿瘤坏死因子中脱除PEG和盐

A serial gel filtration operation with the combination of G25 and G100 in one column was developed to remove salt and PEG from upper phase rich in recombinant human tumor necrosis factor α after simultaneous cell disruption and two-phase aqueous extraction. Buffer exchanging and primary purification were also achieved at same time. The purification factor of 4.4 was obtained with an activity recovery of 97% by one single step of serial operation.

一种新型提取SOD的方法——串联凝胶过滤层析法

目的:建立串联凝胶过滤层析法,一步即可从猪血中提取纯酶。方法:猪血中粗酶液的分离采用经典的有机溶剂(乙醇-氯仿)的方法进行。后在室温下用葡聚糖G100-G50进行柱层析,层析液用pH 7.6,0.02 mol/L-1的磷酸盐缓冲液。首次过柱就可生产出一部分纯酶。接着收集不纯的酶液,再进行第2次串联层析,就可把所有的酶液彻底纯化。结果:2次之和的酶液总产率达70%,比活性达4700 u.mg-1。结论:经聚丙烯酰胺凝胶电泳及SDS-聚丙烯酰胺凝胶电泳鉴别,该产品是高纯度的,并且高产率。