
pCold expression vectors offer cold-shock expression technology for high-purity, high-yield protein production.
The pCold series includes several different vectors. Each includes the cold-shock Protein A (cspA) promoter for expression of high-purity, high-yield recombinant protein in E. coli. These vectors selectively induce target protein synthesis at a low temperature (15°C), a condition which suppresses the expression of host proteins and decreases protease activity. This results in high yields of target proteins (60% of intracellular protein). In addition to the cspA promoter, all vectors contain a lac operator, ampicillin resistance gene (ampr), ColE1 origin of replication, M13 IG fragment, and a multiple cloning site (MCS). Four of the vectors contain either a translation enhancing element (TEE), his-tag sequence, and/or Factor Xa cleavage site. The pCold GST vector contains a glutathione S-transferase (GST) sequence and can be used for the expression of proteins with an N-terminal GST tag.These vectors work equally well for synthesis of non-labeled and radiolabeled proteins, and can be used in conjunction with our Chaperone Plasmid Set.
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我分别用3ul、5ul、8ul都试过了,没有任何条带,用别人别的方法提好的DNA做,却能出现结果,不知道是自己提取的DNA浓度不够,还是根本没有提取出来。
不知道谁用过,或者有更好的全血提取NDA的试剂盒推荐呢?
本人刚刚开始做PCR,谢谢各位高手!

