pProLabel-N載體描述 pProLabel-N is a mammalian expression vector designed to express a protein of interest fused to the the n-terminus of a 6 kDa ProLabel tag. The resulting fusion protein can be used in a variety of functional assays and quantitated with our ProLabel Detection Kit II (Cat. No. 631629). The Detection Kit provides all of the components needed to perform enzyme fragment complementation assays (1, 2). In these assays, two inactive enzyme fragments (the ProLabel tag, and a larger Enzyme Acceptor) are combined to form a complete, active enzyme that cleaves the Galacton Star chemiluminescent substrate. The resulting signal can be detected and quantitated with any standard luminometer.
The pProLabel-C vector contains a CMV promoter that drives strong, constitutive expression of the fusion protein, and an SV40 polyadenylation signal that directs processing of the 3’end of the mRNA transcript. The vector also contains a kanamycin/neomycin resistance cassette (Kanr/Neor) that allows G418 selection of stably transfected eukaryotic cells; a bacterial promoter upstream of this cassette allows kanamycin or neomycin selection of transformed bacterial cells. In addition, pProLabel-C contains an SV40 origin of replication for propagation in mammalian cells that express SV40 T-antigen, a pUC origin for propagation in E. coli and an f1 origin for the production of single-stranded DNA.

In order to create a fusion of your protein of interest and the ProLabel tag, your gene of interest must be in the same reading frame as the ProLabel tag sequence, and there can be no intervening stop codons. Prolabel vector constructs can be transfected into mammalian cells using standard transfection methods. ProLabel fusion protein expression levels can be measured quantitatively from mammalian cell lysates using the method described in the ProLabel Detection Kit II Protocol-at-a-Glance (PT3987-2). This highly sensitive and rapid procedure obviates the need for Western analysis. The assay is designed to be used with any ProLabel fusion in a variety of functional assays—from measuring target gene expression in RNAi knockdown studies to measuring protein interactions in coimmunoprecipitation studies.

Propagation in E. coli
 Suitable host strains: DH5α, Fusion Blue, and other general purpose strains. Single-stranded DNA production requires a host containing an F plasmid, such as JM101 or XL1-Blue.
 Selectable marker: plasmid confers resistance to kanamycin (50 μg/ml) in E. coli hosts.
 E. coli replication origin: pUC
 Copy number: ~500
 Plasmid incompatibility group: pMB1/ColE1 參考文獻 1. Gorman, C. (1985) In DNA cloning: A practical approach, Vol. II. Ed. D.M. Glover. (IRL Press, Oxford, UK) pp. 143–190.
2. Eglen, R.M. and Singh, R. (2002) Comb. Chem. High Throughput Screen. 6: 381–387.

Note: The attached sequence file has been compiled from information in the sequence databases, published literature, and other sources, together with partial sequences obtained by Clontech. This vector has not been completely sequenced.