When working with protein expression and purification workflows in a laboratory setting, understanding the precise characteristics of your reagents is essential. Among the most widely discussed tools for protein analysis is the 3x flag peptide molecular weight. Having spent cons Molecular Weight, 2861.87; Formula, C120H169N31O49S ; Cas No. 402750-12-3 ; Smiles Read more iderable time in the lab optimizing purification protocols, I have found that consistency in these technical specifications is what separates a successful experiment from one that requires troubleshooting.
Defining the 3x Flag Peptide
The 3x flag peptide is a synthetic oligopeptide consisting of 23 amino acid residues. Its design is based on the repetition of the classic FLAG epitope, which is a highly charged sequence often used in various biochemical applications. Because it incorporates multiple aspartate units, it possesses unique chemical properties that facilitate specific binding interactions.
In my experience, when selecting a 3x FLAG reagent, the molecular weight is a critical parameter for stoichiometric calculations during the elution phase. While different suppliers might provide slightly varied data based on their specific synthesis and purification methods, the most commonly cited molecular weight is 2861.87 Da.
Comparing Molecular Weight Variations
It is common to encounter minor discrepancies in technical datasheets. You may see values such as 2861.87 or 2861.85, and in some literature, the molecular weight 2864 is referenced. Ad Molecular Weight, 2861.87; Formula, C120H169N31O49S ; Cas No. 402750-12-3 ; Smiles Read more ditionally, some sources report a mol Price, 0.00 ; Cat. No. RP21087-10 ; Size. 10 mg. Buy in bulk ; Synonyms, DYKDDDDK tag;Flag-tag;3xFlag; Description, A fusion tag, called MDYKDHDGDYKDHDIDYKDDDDK Read more ecular weight, 2,862 g/mol, which is essentially a rounding of the more precise 2861.87 Da figure.
It is important to note that these variations are often minor and generally relate to the hydration state of the lyophilized powder or the specific salt form used during synthesis. For instance, while a standard 3x flag peptide is often listed at 2861.87 Da, other variants or specific formulat Molecular Weight.2861.87 Da. Purity: > 95%. Source: Synthetic. Format: Lyophilized white powder. QC analysis: Mass Spec and LC-HPLC. Storage (short term):. 2-8 Read more ions might show a molecular weight of 2730.71 Da. Always check the specific Certificate of Analysis provided with your batch to ensure your calculations are accurate.
Practical Considerations for Laboratory Use
When using 3xFLAG peptide for competitive elution, the tag plays a vital role. The 3X FLAG peptide is designed to compete with the fusion protein for binding sites on the antibody, such as those found on FLAGM2 agarose beads.
1. Solubility: Most high-quality 3x FLAG peptides are 3X FLAG Peptide soluble in water or dilute acetic acid. I have found that ensuring complete dissolution is key to maintaining a stable working concentration.
2. Storage: To preserve the integrity of these peptides, I strictly adhere to the manufacturer's storage instructions, typically keeping the vials at -20°C.
3. Application: Whether you are working with a 3x flag fusion protein or conducting FLAG peptide elution, verifying that the tag Peptide is of high purity (typically >95%) is essential for consistent results.
Summary of Technical Specifications
For those tracking the 3x flag peptide molecular weight, here is a summary of the common data points:
* Commonly cited value: 2861.87 Da
* Format: Usually supplied as a lyophilized white powder
* Chemical Formula: C120H169N31O49S
* Sequence: MDYKDHDGDYKDHDIDYKDDDDK
Understanding the nuances of these peptides—from their molecular weight to their specific sequence—allows for more precise experimental design. While the standard 3x FLAG is a robust tool, always verify the specific molecular weight provided by your s Molecular Weight.2861.87. Formula. C120H169N31O49S. Purity. 99.35. Solubility. ≥143.1mg/mL in DMSO, <14.35mg/mL in EtOH, ≥143.4mg/mL in H2O with gentle warming Read more upplier to ensure your 3x flag 3X Flag peptide - Blog experiments proceed as expected. By paying close attention to these technical details, you can achieve cleaner protein purification and more reliable detection in your biochemical research.