Cystatin C/CST3 Protein, Rat (HEK293, His)

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Cystatin C/CST3 protein is a vital regulator of cysteine proteinases, inhibiting enzymes like cathepsin B, H, and L to ensure proper enzyme activity.Its role as a local regulator underscores its significance in various biological processes.Cystatin C/CST3 Protein, Rat (HEK293, His) is the recombinant rat-derived Cystatin C/CST3 protein, expressed by HEK293 , with C-His labeled tag.

For research use only. We do not sell to patients.
  • Species: Rat
  • Source: HEK293
  • Storage:
    Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.
  • Biological Activity
  • Technical Parameters
  • Product Properties
  • Documentation
  • Help & FAQs

Biological Activity

Description

Cystatin C/CST3 protein is a vital regulator of cysteine proteinases, inhibiting enzymes like cathepsin B, H, and L to ensure proper enzyme activity.Its role as a local regulator underscores its significance in various biological processes.Cystatin C/CST3 Protein, Rat (HEK293, His) is the recombinant rat-derived Cystatin C/CST3 protein, expressed by HEK293 , with C-His labeled tag.

Background

Cystatin C, also known as CST3 protein, is a crucial regulator of cysteine proteinases. This protein acts as an inhibitor, specifically targeting enzymes such as cathepsin B, H, and L, to maintain proper enzyme activity. Its physiological role as a local regulator highlights its significance in various biological processes.

Verified Bioactivity

Measured by its ability to inhibit papain cleavage of a fluorogenic peptide substrate Z-FR-AMC. Read at excitation and emission wavelengths of 380 nm and 460 nm (top read). The IC50 value is 5.37 nM. (Activation description: The proenzyme needs to be activated in reducing buffer for an activated form.)

Technical Parameters

  • Species Rat
  • Source HEK293
  • Tag C-His
  • Accession
  • Gene ID
  • Molecular Construction
    • N-term
    • CST3 (G21-A140)
      Accession # P14841
    • His
    • C-term
  • Protein Length

    Full Length

  • Synonyms

    CST3; Cystatin C (Amyloid Angiopathy And Cerebral Hemorrhage); Cystatin C; BA218C14.4 (Cystatin C); Epididymis Secretory Protein Li 2; Cystatin 3; Neuroendocrine Basic Polypeptide; Cystatin-3; Post-Gamma-Globulin; HEL-S-2; Gamma-Trace; ADLDWA; Cystatin-C;

  • AA Sequence

    GTSRPPPRLLGAPQEADASEEGVQRALDFAVSEYNKGSNDAYHSRAIQVVRARKQLVAGINYYLDVEMGRTTCTKSQTNLTNCPFHDQPHLMRKALCSFQIYSVPWKGTHTLTKSSCKNA

  • Molecular Weight

    Approximately 18-25 kDa, based on SDS-PAGE under reducing conditions.

  • Glycosylation

    Yes

  • Purity

    ≥ 95%, as determined by reducing SDS-PAGE.

Product Properties

Appearance

Lyophilized powder

Formulation

Lyophilized from a 0.2 μm filtered solution of 20 mM HEPES, 150 mM NaCl, pH 7.0.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Calculators

Reconstitution Calculator

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) Volume (to add to vial)
=
Mass (in vial) Mass (in vial)
÷
Desired Reconstitution Concentration Desired Reconstitution Concentration
Dilution Calculator

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

Concentration (start) Concentration (start)
×
Volume (start) Volume (start)
=
Concentration (final) Concentration (final)
×
Volume (final) Volume (final)
The Specific Activity Calculator Equation
  • Specific Activity (Unit/mg)
  • Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) Specific Activity (Unit/mg)
Unit/mg
= 106 ÷
Biological Activity (ED50) Biological Activity (ED50)
106 ÷
ng/mL
MOQ
Minimum order quantity
100 mg

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