A rapid method for gene expression analysis, PURExpress®is a novel cell-free transcription/translation system reconstituted from the purified components necessary forE. colitranslation. With minimal nuclease and protease activity, the PURExpress system preserves the integrity of DNA and RNA templates/complexes and results in proteins that are free of modification and degradation. Transcription and translation are carried out in a one-step reaction, and require the mixing of only two tubes. With results available in a few hours, PURExpress saves valuable laboratory time and is ideal for high throughput technologies.
PURExpress CitationsFigure 1: Protein expression using the PURExpress® In Vitro Protein Synthesis Kit.25 μl reactions containing 250 ng template DNA and 20 units RNase Inhibitor were incubated at 37°C for 2 hours. 2.5 μl of each reaction was analyzed by SDS-PAGE using a 10–20% Tris-glycine gel. The red dot indicates the protein of interest. Marker M is the Protein Ladder (NEB #P7703, discontinued and replaced with NEB #P7717 ).Figure 2: Incorporation of 35S-methionine enables visualizationof protein by autoradiography.25 μl reactions containing 250 ng template DNA, 20 units RNase Inhibitor and 2 μl 35S-met were incubated at 37°C for 2 hours. 2.5 μl of each reaction was analyzed by SDS-PAGE, the gel was fixed for 10 minutes, dried for 2 hours at 80°C and exposed to x-ray film for 5 hours at -80°C.Figure 3: Schematic diagram of protein synthesis and purification by PURExpress.Figure 4: Expression and reverse purification of DHFR (A) and T4 DNA Ligase (B) using PURExpress.125 μl reactions were carried out according to recommendations in the accompanying manual. Samples were analyzed on a 10–20% Tris-glycine gel and stained with Coomassie Blue. Note that in both cases, the desired protein can be visualized in the total protein fraction. The red dot indicates the protein of interest. Marker M is the Protein Ladder (NEB #P7703, discontinued and replaced with NEB #P7717 ).
This product is related to the following categories:
PURExpress,
Cell-Free Protein Expression,
Protein Expression
This product can be used in the following applications:
核糖核酸酶A是内切核糖核酸酶,可特异地攻击RNA上嘧啶残基的3'端,切割与相邻核苷酸形成的磷酸二酯键。反应终产物是嘧啶3'磷酸及末端带嘧啶3'磷酸的寡核苷酸。无辅因子及二价阳离子存在时,核糖核酸酶A的作用可被胎盘RNA酶抑制剂(B1ackburn et al.1977)或氧钒—核糖核苷复合物(Puskas et al.1982)所抑制。核糖核酸酶A用途生化研究,测定核酸的结构RNase 保护检测去除非... 查看更多>