pSNAPf-Cox8A Control Plasmid

  • This product was discontinued on 01/01/2013
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This control plasmid contains the gene encoding the Cytochrome C oxidase, subunit 8-2 (COX8-2) protein cloned upstream of the SNAPf coding sequence in pSNAPf, as a fusion to the N- terminus of the SNAP-tag. Cytochrome C oxidase is located in the inner mitochondrial membrane and is the terminal enzyme of the respiratory chain. The COX8-2-SNAPf fusion protein gives mitochondrial fluorescence when labeled with SNAP-Cell™ substrates. The full sequence and map for pSNAPf-Cox8A can be downloaded.

The SNAP-tag is a novel tool for protein research, allowing the specific, covalent attachment of virtually any molecule to a protein of interest. The SNAP-tag is a small protein based on human O6-alkylguanine-DNA-alkyltransferase (hAGT). SNAP-tag substrates are derivatives of benzyl purines and benzyl pyrimidines. In the labeling reaction, the substituted benzyl group of the substrate is covalently attached to the SNAP-tag.

pSNAPf-Cox8A contains an improved version of SNAP-tag, termed SNAPf. SNAPf displays faster kinetics in in vitro labeling and fast, specific and efficient labeling in live and fixed cell applications, thereby rendering it a desired research tool for analysis of protein dynamics.

There are two steps to using this system: sub cloning and expression of the protein of interest as a SNAPf fusion, and labeling of the fusion with the SNAP-tag substrate of choice. Expression of the SNAPf-Cox8A fusion protein is described in this document. The labeling of the fusion proteins with SNAP-tag substrates is described in the instructions supplied with SNAP-tag substrates.

Live HEK293 cells transiently transfected with pSNAPf-Cox8A. Cells were labeled with SNAP-Cell TMR-Star (red) for 15 minutes and counterstained with Hoechst 33342 (blue).


Properties and Usage

Materials Required but not Supplied

Cell culture media and reagents
Mammalian cell lines
Transfection reagents
SNAP-tag substrates

Storage Temperature


Sequence Files

Fasta  GenBank  


  1. Storage: pSNAPf-Cox8A is supplied in TE buffer (10 mM Tris-HCl, pH 8.0, 1 mM EDTA) at a concentration of 0.5 µg/µl. Plasmid solutions can be stored at 4°C for up to one week. For long-term storage -20°C is recommended.


  1. Cellular Imaging and Analysis FAQs

Tech Tips

If you generate more plasmid DNA by bacterial transformation, we recommend isolating the plasmid DNA using an endotoxin-free plasmid prep kit prior to transfection into mammalian cells.


  1. Expression of SNAPf Fusions (N9185)

Selection Charts

Troubleshooting Guides

Interactive Tools

Application Notes

Safety Data Sheet

The following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.