2. Peptides
  3. Peptide and Derivatives
  4. Peptide Epitopes
  5. Tag Peptides
  6. X-press Tag Peptide

X-press Tag Peptide is a tag peptide used for protein purification. X-press Tag is also an N-terminal leader peptide; this N-terminal peptide contains a polyhistidine sequence, the Xpress epitope (part of bacteriophage T7 gene 10 protein) and an enterokinase cleavage site. Anti-Xpress antibodies recognize the Xpress epitope sequence found in this leader peptide.

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Custom Peptide Synthesis

X-press Tag Peptide Chemical Structure

X-press Tag Peptide Chemical Structure

CAS No. : 339988-16-8

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5 mg USD 100 In-stock
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Based on 1 publication(s) in Google Scholar

X-press Tag Peptide Related Antibodies

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Description

X-press Tag Peptide is a tag peptide used for protein purification. X-press Tag is also an N-terminal leader peptide; this N-terminal peptide contains a polyhistidine sequence, the Xpress epitope (part of bacteriophage T7 gene 10 protein) and an enterokinase cleavage site. Anti-Xpress antibodies recognize the Xpress epitope sequence found in this leader peptide.

Molecular Weight

997.96

Formula

C41H59N9O20
CAS No.
Appearance

Solid

Color

White to off-white

Sequence

Asp-Leu-Tyr-Asp-Asp-Asp-Asp-Lys
Sequence Shortening

DLYDDDDK
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

Sealed storage, away from moisture and light, under nitrogen

Powder -80°C 2 years
-20°C 1 year

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light, under nitrogen)

Solvent & Solubility
In Vitro: 

H2O : ≥ 100 mg/mL (100.20 mM)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.0020 mL 5.0102 mL 10.0204 mL
5 mM 0.2004 mL 1.0020 mL 2.0041 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light, under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light, under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O 1 mM 1.0020 mL 5.0102 mL 10.0204 mL 25.0511 mL
5 mM 0.2004 mL 1.0020 mL 2.0041 mL 5.0102 mL
10 mM 0.1002 mL 0.5010 mL 1.0020 mL 2.5051 mL
15 mM 0.0668 mL 0.3340 mL 0.6680 mL 1.6701 mL
20 mM 0.0501 mL 0.2505 mL 0.5010 mL 1.2526 mL
25 mM 0.0401 mL 0.2004 mL 0.4008 mL 1.0020 mL
30 mM 0.0334 mL 0.1670 mL 0.3340 mL 0.8350 mL
40 mM 0.0251 mL 0.1253 mL 0.2505 mL 0.6263 mL
50 mM 0.0200 mL 0.1002 mL 0.2004 mL 0.5010 mL
60 mM 0.0167 mL 0.0835 mL 0.1670 mL 0.4175 mL
80 mM 0.0125 mL 0.0626 mL 0.1253 mL 0.3131 mL
100 mM 0.0100 mL 0.0501 mL 0.1002 mL 0.2505 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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X-press Tag Peptide Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

X-press Tag Peptide339988-16-8OthersInhibitorinhibitorinhibit

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