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Your Position: Home > All Other Proteins > Cathepsin B > CTB-H5222

Human Cathepsin B / CTSB Protein, His Tag (active enzyme)

  • Synonym
    CTSB,CPSB,APPS
  • Source
    Human Cathepsin B, His Tag (CTB-H5222) is expressed from human 293 cells (HEK293). It contains AA Arg 18 - Ile 339 (Accession # P07858-1(L26V)).
    Predicted N-terminus: Arg 18 & Leu 80
  • Molecular Characterization
    Online(Arg 18 - Ile 339) P07858-1 (L26V)

    This protein carries a polyhistidine tag at the C-terminus. The Human Cathepsin B will be further processed into mature form (Leu 80-Ile 339). The protein has a calculated MW of 36.7 kDa (pro-form) and 29.5 kDa (mature-form). The protein migrates as 42-50 kDa and 34 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 150 mM NaCl, pH8.0. Normally trehalose is added as protectant before lyophilization.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Human Cathepsin B, His Tag (Cat. No. CTB-H5222) SDS-PAGE gel

Human Cathepsin B, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

Bioactivity

Measured by its ability to cleave the fluorogenic peptide substrate Z-LR-AMC. The specific activity is >2,500 pmol/min/µg, as measured under the described conditions (QC tested).

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