1. TGF-beta/Smad
  2. TGF-β Receptor
  3. KRFK TFA

KRFK TFA, a peptide derived from TSP-1, can activate TGF-β. KRFK TFA promotes TGF-β-mediated signaling and its downstream role, independent of thrombospondin (TSP) receptors such as CD47 and CD36. KRFK TFA can be used for chronic ocular surface inflammatory disorders reseach.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

KRFK TFA Chemical Structure

KRFK TFA Chemical Structure

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Based on 2 publication(s) in Google Scholar

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Description

KRFK TFA, a peptide derived from TSP-1, can activate TGF-β. KRFK TFA promotes TGF-β-mediated signaling and its downstream role, independent of thrombospondin (TSP) receptors such as CD47 and CD36. KRFK TFA can be used for chronic ocular surface inflammatory disorders reseach[1].

IC50 & Target

TGF-β[1]

In Vitro

KRFK TFA (50 μM; 24 h) activates the secretion of TGF-β and reduces the expression of DC maturation markers in tsp-1 deficient bone marrow-derived dendritic cells (BMDCs) [1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

KRFK TFA (5 μg/5 μL/eyes; single dose) significantly prevents the development of chronic ocular surface inflammation in TSP-1-/- mice[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight

577.73 (free base)

Formula

C27H47N9O5.xC2HF3O2

Appearance

Solid

Color

White to off-white

Sequence

Lys-Arg-Phe-Lys

Sequence Shortening

KRFK

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

Sealed storage, away from moisture

Powder -80°C 2 years
-20°C 1 year

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

Solvent & Solubility
In Vitro: 

DMSO : ≥ 100 mg/mL

*"≥" means soluble, but saturation unknown.

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

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

This equation is commonly abbreviated as: C1V1 = C2V2

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In Vivo Dissolution Calculator
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
Purity & Documentation

Purity: 99.90%

References
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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.

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Product Name:
KRFK TFA
Cat. No.:
HY-P3970A
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