Z-Cy2 NHS Ester
Amine mono-reactive zwitterionic and pI balancing Cy2 dye (Z-Cy2 NHS Ester) with titratable side chain tertiary amine. This reagent can be used to attach Cy2 fluorophore to proteins and peptides through lysine residues.
Highlights:
- Highly water-soluble due to cysteic acid group
- Titratable amine group balances protein pI by compensating for the loss of a lysine side chain upon labeling
- Enhanced detection sensitivity, compared to traditional CyDyes
- NHS Ester functionality
From the laboratories of Edward A. Dratz, PhD, and Paul A. Grieco, PhD, Montana State University.
See more by visiting the Grieco Group Labpage.
Part of The Investigator's Annexe program.
Amine mono-reactive zwitterionic and pI balancing Cy2 dye (Z-Cy2 NHS Ester) with titratable side chain tertiary amine. This reagent can be used to attach Cy2 fluorophore to proteins and peptides through lysine residues.
Highlights:
- Highly water-soluble due to cysteic acid group
- Titratable amine group balances protein pI by compensating for the loss of a lysine side chain upon labeling
- Enhanced detection sensitivity, compared to traditional CyDyes
- NHS Ester functionality
From the laboratories of Edward A. Dratz, PhD, and Paul A. Grieco, PhD, Montana State University.
See more by visiting the Grieco Group Labpage.
Part of The Investigator's Annexe program.
| Catalog Number | Product | DataSheet | Size | AVAILABILITY | Price | Qty |
|---|
| Product Type: | Small Molecule |
| Name: | Z-Cy2 NHS Ester |
| Chemical Formula: | C46H51F3N6O13S |
| Molecular Weight: | 985 |
| Format: | Orange powder |
| Purity: | 95+% (NMR, HPLC) |
| Solubility: | Good in water and polar organic solvents |
| Spectral Information: | Excitation maximum: 485nmExtinction at max excitation: 155,000Emission maximum: 500nmFluorescence quantum yield: 0.07 |
| Storage: | -20C. Protect from light. Dessicate. |
| Shipped: | Cold packs |
Application Notes
Suggested amount: 400pmol/50ug protein.
Labeling is performed according to the standard protocol from GE Healthcare. 50 µg of protein extract was labeled on ice in the dark for 30 min with 400 pmoles of the N-hydroxysuccinimide esters of the Z-CyDyes (Z-Cy2, Z-Cy3 and Z-Cy5) dissolved in 99.8% DMF. Labeling reactions were performed in urea labeling buffer (30 mM Tris-HCl pH 8.5, 7 M urea, 2 M thiourea, 4% CHAPS, and 1% ASB-14) and were quenched by the addition of 2 µL of a 10 mM L-lysine solution and left on ice for 10 min.
2D DIGE Examples
2D gel of total soluble protein from Sulfolobus solfataricus labeled with Z-CyDyes. Each dye was used to label the protein sample separately. Dye labeled protein samples were combined and run on the same gel. After separation, the gel was scanned with 100 ?m steps using the following laser excitation/band-pass filter combinations: 488/520 nm for Z-Cy2 (left), 532/580 nm for Z-Cy3 (middle), and 633/670 nm for Z-Cy5 (right). Images show the relatively crowded central region of the gel (pI 4?9 and 15?150 kDa), revealing well-defined spots with all three dyes.
Adapted from: Epstein MG, et al. Bioconjug Chem. 2013 Sep 18;24(9):1552-61.
Comparison of Total Spot Number
Total number of spots detected from a gel using Z-Cy2, ZCy3, and Z-Cy5 and from a matched gel using CyDye DIGE Fluor minimal Cy2, Cy3, and Cy5 purchased from GE Healthcare. The protein samples labeled and experimental protocols were the same for both gels and all dyes. Progenesis SameSpots software detects more spots when Z-CyDyes are used in comparison to CyDyes.
Adapted from: Epstein MG, et al. Bioconjug Chem. 2013 Sep 18;24(9):1552-61.
Looking for a different Z-Cy Dye? Check out our other Z-Cy Dyes!
- Epstein MG, Reeves BD, Maaty WS, Fouchard D, Dratz EA, Bothner B, Grieco PA. Enhanced sensitivity employing zwitterionic and pI balancing dyes (Z-CyDyes) optimized for 2D-gel electrophoresis based on side chain modifications of CyDye fluorophores. New tools for use in proteomics and diagnostics. Bioconjug Chem. 2013 Sep 18;24(9):1552-61.
- Reeves BD, Joshi N, Campanello GC, Hilmer JK, Chetia L, Vance JA, Reinschmidt JN, Miller CG, Giedroc DP, Dratz EA, Singel DJ, Grieco PA. Conversion of S-phenylsulfonylcysteine residues to mixed disulfides at pH 4.0: utility in protein thiol blocking and in protein-S-nitrosothiol detection. Org Biomol Chem. 2014 Jul 2.
If you publish research with this product, please let us know so we can cite your paper.
